POLYMORPHIC FORMS OF TEGASEROD BASE AND SALTS THEREOF Cross-Reference to Related Applications This application claims the benefit of U.S. Provisional Application Nos. 60/530,278 filed on December 16,2003, 60/585,423 filed on July 2 2004, and 60/609,715 filed on September 14,2004, the disclosure of which are incorporated by reference in its entirety herein. Field of the Invention The present invention relates to solid state chemistry of tegaserod base and salts thereof. Background of the Invention Tegaserod maleate is an aminoguanidine indole 5HT4 agonist for the treatment of irritable bowel syndrome (IBS). Tegaserod maleate has the following structure:1 (Figure Removed) According to the prescribing information (Physician's Desk Reference, 57th Ed., at Page 2339), tegaserod as the maleate salt is a white to off-white crystalline powder and is slightly soluble in ethanol and very slightly soluble in water. 1PCOM000021161D characterizes the marketed polymorphic form of tegaserod maleate (ZELNORM), and designates the crystalline form of ZELNORM as tegaserod maleate Form A, which is characterized by an X-ray Diffraction pattern with peaks at 5.4, 6.0, 6.6 and 10.8 ±0.2 degrees two theta. The crystalline form is further characterized by an X-ray Diffraction pattern having peaks at about 5.9, 6.4, 11.5, 12.0,14.8,15.4,16.2,18.1,19.4,21.7, 23.9,26.8 and 29.7±0.2 degrees two theta. One embodiment of the present invention relates to the solid state physical properties of tegaserod base and salts thereof. These properties may be influenced by controlling the conditions under which tegaserod base or its salt is obtained in solid Form. Solid state physical properties include, for example, the flowability of the milled solid. Flowability affects the ease with which the material is handled during processing into a pharmaceutical product. When particles of the powdered compound do not flow past each other easily, a formulation specialist must take that fact into account in developing a tablet or capsule formulation, which may necessitate the use of glidants such as colloidal silicon dioxide, talc, starch or tribasic calcium phosphate. Another important solid state property of a pharmaceutical compound is its rate of dissolution in aqueous fluid. The rate of dissolution of an active ingredient in a patient's stomach fluid may have therapeutic consequences since it imposes an upper limit on the rate at which an orally-administered active ingredient may reach the patient's bloodstream. The rate of dissolution is also a consideration in formulating syrups, elixirs and other liquid medicaments. The solid state Form of a compound may also affect its behavior on compaction and its storage stability. These practical physical characteristics are influenced by the conformation and orientation of molecules in the unit cell, which defines a particular polymorphic Form of a substance. The polymorphic form may give rise to thermal behavior different from that of the amorphous material or another polymorphic Form. Thermal behavior is measured in the laboratory by such techniques as capillary melting point, mermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) and may be used to distinguish some polymorphic forms from others. A particular polymorphic Form may also give rise to distinct spectroscopic properties that may be detectable by powder X-ray crystallography, solid state C NMR spectrometry and infrared spectrometry. Tegaserod maleate is disclosed in US patent No. 5,510,353 and in its equivalent EP 0 505 322 (example 13). The '353 patent also discloses the preparation of tegaserod base by reacting indole-3-carbaldehyde and aminoguanidine in a protic solvent in the presence of inorganic or organic acid (example 2a describes the reaction in methanol and hydrochloric acid). The '353 patent however provides no detailed procedure to crystallize the base. Moreover the procedure to obtain the crystalline maleate salt from the base is completely absent. Tegaserod base and tegaserod maleate are characterized in the '353 patent by a melting point of 124 and 190°C respectively (table 1 example 13). The literature (Buchheit K.H, et al, J.Med.Chem., 1995,38, 2331) describes a general method for the condensation of aminoguanidines with indole-3-carbadehydes in methanol in the presence of HC1 (pH 3-4). The product obtained after solvent evaporation may be converted to its hydrochloride salt by treatment of the methanolic solution with diethylether/HCl followed by recrystallization from methanol/diethylether. Tegaserod base prepared according to this general method is characterized solely by a melting point of 155 °C (table 3 compound 5b). Additional Tegaserod maleate characterization was done by !H and 13C-NMR according to the literature (Jing J. et. al., Guangdong Weiliang YuansuKexue, 2002,9/2, 51). Chinese patent No. CN 1425651A, presents X-ray diffractograms of two crystalline forms. Forms B2 and C which are characterized by the present applicants match the X-Ray powder diffraction of Chinese patent No. CN 1425651A. Form S of CN 1425651A is however defined as a hydrate and may have a different molecular composition at least hi respect to Form B2, discussed hi further detail below. WO 04/085393 discloses four crystalline forms of tegaserod maleate. The search report for WO 04/085393 further identifies WO 00/10526, and Drugs Put. 1999,24(1) which provides an overview for tegaserod maleate. The discovery of new polymorphic forms of a pharmaceutically useful compound provides a new opportunity to improve the performance characteristics of a pharmaceutical product. It enlarges the repertoire of materials that a formulation scientist has available for designing, for example, a pharmaceutical dosage form of a drug with a targeted release profile or other desired characteristic. hi addition to allowing for improved formulations, the polymorphic forms may be used for calibration of XRD, FTIR or DSC instruments. The polymorphic forms may further help in purification of tegaserod, particularly if they possess high crystallinity. hi the event of metastabiliry, a metastable polymorphic form may be used to prepare a more stable polymorph. Hence, discovery of new polymorphic forms and new processes help in advancing a formulation scientist in preparation of tegaserod as an active pharmaceutical ingredient in a formulation. The present invention provides additional polymorphic forms of tegaserod and salts thereof. Summary of the Invention In one aspect, the present invention provides a process for preparing crystalline form of tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 5.4, 6.0, 6.6 and 10.8 ±0.2 degrees two theta (Form A) comprising: a) preparing a solution of tegaserod maleate in an solvent; and b) recovering the crystalline form as a precipitate. wherein the solvent is selected from the group consisting of acetonitrile, butyl lactate, methyl ethyl ketone, butanol, dioxane, ethanol, isopropanol, chloroform, ethoxyethanol, 2-ethoxyethanol, pyrolidone, dimethyl sulfoxide, N,N-Dimethylformamide, l-methyl-2-pyrrolidone, N,N-Dimethylacetamide, water and mixtures thereof, with the proviso that water is not used as an individual solvent. In another aspect, the present invention provides a process for preparing crystalline tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 5.4,6.0,6.6 and 10.8 ±0.2 degrees two theta (Form A) comprising heating a solvate of tegaserod maleate to cause desolvation. In another aspect, the present invention provides a process for preparing crystalline form of tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 5.4, 6.0, 6.6 and 10.8 ±0.2 degrees two theta (Form A) comprising: a) combining a solution of maleic acid in a solvent with a solution of tegaserod free base in the same or different solvent; and b) recovering the crystalline form as a precipitate. wherein the solvent is selected from the group consisting of acetonitrile, n-butanol, dioxane, methyl ethyl ketone, ethyl lactate, ethyl acetate and water. In another aspect, the present invention provides a process crystalline form of tegaserod maleate (Form B) characterized by an X-ray Diffraction pattern having peaks at 15.7,16.9,17.2,24.1,24.6 and 25.2±0.2 two theta. In another aspect, the present invention provides a process for preparing Form B comprising slurrying a tegaserod maleate in solid state in 1-propanol, and recovering the crystalline form. In another aspect, the present invention provides a crystalline form of tegaserod maleate (Form Bl) characterized by an X-ray Diffraction pattern having peaks at 10.3, 16.1,16.5,17.1, 20.3, 22.0, and 25.3 ±0.2 two theta. In another aspect, the present invention provides a process for preparing crystalline Form Bl comprising: a) preparing a solution of tegaserod maleate in chloroform, optionally in mixture with methanol or ethanol; and b) recovering the crystalline form as a precipitate. In another aspect, the present invention provides a crystalline tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 8.7, 15.6,16.0,22.2, 25.3 and ±0.2 two theta (Form B2), wherein the crystalline form is an ethanolate solvate. In another aspect, the present invention provides a process for preparing the crystalline Form B2 comprising: a) slurrying a crystalline form of tegaserod maleate in ethanol; and b) recovering the crystalline tegaserod maleate. In another aspect, the present invention provides a crystalline form of tegaserod maleate (Form B3) characterized by an X-ray Diffraction pattern having peaks at 15.6,16.0,22.5,25.5 and 29.3 ±0.2 two theta. In another aspect, the present invention provides a process for preparing Form B3 comprising crystallizing the crystalline form from ethanol, or slurrying tegaserod maleate in ethanol or contacting tegaserod maleate with vapors of ethanol. In another aspect, the present invention provides a process for preparing Form B3 comprising: a) combining a solution of maleic acid in ethanol with a solution of tegaserod free base in ethanol; and b) recovering the crystalline form as a precipitate. In another aspect, the present invention provides a process for preparing crystalline tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 7.8, 8.7,17.1,17.3 and 25.1 ±0.2 two theta (Form C) comprising heating crystalline tegaserod maleate characterized by an XRD pattern with peaks at 8.7,15.6, 16.0,22.2,25.3 and ±0.2 two theta (Form B2) at a temperature of at least about 40°C. In another aspect, the present invention provides a crystalline form of tegaserod maleate (Form D) having an X-ray powder diffraction with peaks at about 14.6,20.2, 23.8,26.0,28.6 and 29.3±0.2 two theta. In another aspect, the present invention provides a process for preparing the crystalline Form D, comprising slurrying or crystallizing the crystalline form in a solvent selected from me group consisting of l-rnethyl-2-pyrrolidone, n-propanol and mixtures thereof. In another aspect, the present invention provides a crystalline form of tegaserod maleate (Form E) having an X-ray powder diffraction with peaks at 10.3,16.6,17.1, 22.0 and 25.4±0.2 two theta. In another aspect, the present invention provides a process for preparing crystalline Form E comprising: a) slurrying tegaserod maleate in dioxane; and b) recovering the crystalline form. In another aspect, the present invention provides a process for preparing the crystalline Form E comprising: a) combining a solution of maleic acid in tetrahydrofuran with a solution of tegaserod free base in tetrahydrofuran; and b) recovering the crystalline form as a precipitate. In another aspect, the present invention provides a crystalline form of tegaserod hemi-maleate having an X-ray powder diffraction with peaks at 5.0, 9.9,19.8, and 25.9±0.2 two theta. In another aspect, the present invention provides a process for preparing crystalline tegaserod hemi-maleate comprising: a) combining tegaserod base, maleic acid and ethyl acetate to obtain a reaction mixture; b) heating the reaction mixture; and c) recovering the crystalline form as a precipitate. In another aspect, the present invention provides a crystalline form of tegaserod base (Form F) having an X-ray powder diffraction with peaks at 10.2,11.3,20.3, 21.3,21.8,27.6,29.6,31.1 and 32.7±0.2 two theta. In another aspect, the present invention provides a process for preparing the crystalline Form F, comprising: a) preparing a solution of tegaserod in a C1 to C8 chlorinated aliphatic hydrocarbon; and b) removing the chlorinated hydrocarbon. In another aspect, the present invention provides a crystalline form of tegaserod base (Form H) having an X-ray powder diffraction with peaks at 8.8,15.1, 17.6, 21.8 and 23.9±0.2 two theta. In another aspect, the present invention provides a process for preparing crystalline Form H comprising: a) preparing a solution of tegaserod base in ethanol; and b) recovering the crystalline form as a precipitate. In another aspect, the present invention provides a process for preparing Form H comprising: a) slurrying tegaserod base in ethyl acetate; and b) recovering the crystalline form from the slurry. In another aspect, the present invention provides amorphous tegaserod base in the solid state. In another aspect, the present invention provides a process for preparing amorphous tegaserod comprising: a) preparing a solution of tegaserod in an organic solvent; and b) removing the solvent. In another aspect, the present invention provides tegaserod acetate in solid state. In another aspect, the present invention provides a crystalline tegaserod acetate. In another aspect, the present invention provides a crystalline form of tegaserod acetate (Form J) having an X-ray powder diffraction with peaks at about 7.3, 8.7,10.9 and 13.5±0.2 two theta. In another aspect, the present invention provides a process for preparing Form J comprising: a) combining tegaserod maleate (or other salt or free base), ethyl acetate or acetic acid, and a base under aqueous condition to obtain a reaction mixture; and b) recovering the crystalline form. In another aspect, the present invention provides a process for preparing Form J comprising: a) slurrying tegaserod base amorphous in ethyl acetate; and b) recovering the crystalline form. In another aspect, the present invention provides a pharmaceutical composition comprising a polymorphic form of tegaserod base, maleate or acetate selected from the group consisting of B, Bl, B3, D, E, J, tegaserod hemimaleate and a pharmaceutically acceptable excipient; and method of treating a huamn suffering from irritable bowel syndrome comprising administering the composition to the human in need thereof. In another aspect, the present invention provides a solvate of tegaserod maleate, wherein the maleate is a solvate of a solvent selected from the group consisting of ethanol, isopropanol, 1-propanol, chloroform and dioxane. In another aspect, the present invention provides a pharmaceutical composition comprising a polymorphic form of tegaserod base or maleate selected from the group consisting of B, Bl, B3, D, E, J, tegaserod hemimaleate, for use in treatment of irritable bowl syndrome. Brief Description of the Figures Figure 1 is an X-Ray powder diffraction of tegaserod maleate Form A. Figure 2 is an X-Ray powder diffraction of tegaserod maleate Form B. Figure 3 is an X-Ray powder diffraction of tegaserod maleate Form Bl. Figure 4 is an X-Ray powder diffraction of tegaserod maleate Form B2. Figure 5 is an X-Ray powder diffraction of tegaserod maleate Form B3. Figure 6 is an X-Ray powder diffraction of tegaserod maleate Form C. Figure 7 is an X-Ray powder diffraction of tegaserod maleate Form D. Figure 8 is an X-Ray powder diffraction of tegaserod maleate Form E. Figure 9 is an X-Ray powder diffraction of tegaserod base Form F. Figure 10 is an X-Ray powder diffraction of tegaserod base Form H. Figure 11 is an X-Ray powder diffraction of tegaserod base amorphous. Figure 12 is an X-Ray powder diffraction of tegaserod acetate Form J. Figure 13 is an X-Ray powder diffraction of tegaserod hemi-maleate. Figure 14 is a DSC curve of tegaserod maleate Form A. Figure 15 is a DSC curve of tegaserod maleate Form B. Figure 16 is a DSC curve of tegaserod maleate Form Bl. Figure 17 is a DSC curve of tegaserod maleate Form B2. Figure 18 is a DSC curve of tegaserod maleate Form B3. Figure 19 is a DSC curve of tegaserod maleate Form C. Figure 20 is a DSC curve of tegaserod maleate Form E. Figure 21 is a DSC curve of tegaserod maleate Form F. Figure 22 is a DSC curve of tegaserod base Form H. Figure 23 is a DSC curve of tegaserod base amorphous. Figure 24 is a DSC curve of tegaserod acetate Form J. Figure 25 is a DSC curve of tegaserod hemi-maleate. Figure 26 is an X-Ray powder diffraction of tegaserod maleate Form A as published inIPCOM000021161D. Detailed Description of the Invention As used herein, the term "reduced pressure" refers to any pressure below one atmosphere. As used herein, the term "vacuum" refers to a pressure below about 50mmHg, with about 30 mmHg or below being preferred. As used herein, the term slurry refers to a hetrogeneous mixture where complete dissolution does not occur. The present invention provides tegaserod acetate. The tegaserod acetate provided by the present invention may be in the solid state, and may also be crystalline. The present invention further provides for polymorphic forms of tegaserod maleate, acetate and base, and processes for their preparation. The typical X-Ray powder diffraction peaks of each form are shown in the following table. The most typical peak positions (degrees 2-theta) of each form are marked in bold. (Figure Removed) These forms are essentially free from other forms, i.e., they contain no more than 5% of other forms. Polymorphic purity may be tested by XRD, with the area under the peaks used to calculate polymorphic purity. Tegaserod maleate Form A A typical DSC of tegaserod maleate Form A has a characteristic endothermic peak at about 185-188°C. Form A may be prepared by crystallization out of a solution of tegaserod maleate in a suitable solvent. Examples of suitable solvents include dipolar aprotic solvents (such as DMSO, DMF, acetonitrile), Q-C4 alkyl acetates (such as ethyl lactate, butyl lactate), C^-Cj alkyl ketones (such as methylethylketone), Ci-C4 alcohols (such as ethanol, n-propanol, isopropanol and butanol), dioxane, halo(CrC4) alkanes (including chlorinated CpC4 hydrocarbons such as chloroform and dichloromethane), ethoxyethanol, 2-ethoxyethanol, pyrrolidone and Cj-Q alkylsubstituted pyrrolidones (e.g. 1-methyl-2-pyrrolidone), water and N,N-dimethylacetamide and mixtures thereof. In one embodiment, Form A is recovered without addition of an anti-solvent. In this embodiment, the solution is preferably cooled to a temperature of about 10EC to about 40°C, more preferably room temperature, to induce crystallization. Water may also be used as a co-solvent to prepare the solution followed by cooling to induce crystallization. In another embodiment, water is added as an antisolvent to a solution of tegaserod maleate in an appropriate solvent to induce crystallization. Form A may also be prepared by crystallization/precipitation by combining a solution of maleic acid in a solvent with a solution of tegaserod free base in the same fy or different solvent. Preferably the solvent is acetonitrile, n-butanol, dioxane, methyl ethyl ketone, ethyl lactate, ethyl acetate or water.Tegaserod maleate Forms B, Bl, B2 and B3 * Tegaserod Forms B, Bl, B2 and B3 are related in that all of them have a characteristic endothermic peak at about 140°C which signifies a desolvation and transformation to Form A. Form B is a solvated form of 1-propanol (Syn. n-propanol) Form Bl is a solvated form of CHCls, and Forms B2 and B3 are solvated forms of ethanol. The term solvate refers to compounds having solvents incorporated into the crystalline structure. Tegaserod maleate Form B The typical DSC curve of tegaserod form B shows one endothermic peak at about 140°C due to desolvation of 1-propanol and transformation to Form A, and one endothermic peak at about 185 to about 188°C due to melting of Form A. Form B is a 1-propanol solvated form (about 7% weight loss by TGA, which corresponds to hemi-1-propanolate-stochiometric value for hemipropanolate: 6.7%). Tegaserod maleate Form B is generally prepared through a slurry of tegaserod maleate Form A in a suitable solvent, preferably n-propanol. The propanol may be in a mixture with water, preferably up to about 20% of water by volume. Tegaserod maleate Form Bl. The typical DSC curve of tegaserod Form B1 shows one endothermic peak at about 140°C due to desolvation and transformation to Form A, and one endothermic peak at about 185-188°C due to melting of Form A. Tegaserod maleate Form Bl is a CHCls solvate (theoretical value: 8.8%). Form Bl shows a TGA curve with 10.8% weight loss step. Form Bl contains 9.2% CHC13 and 1% EtOH as residual solvents, as measured by GC. The integration of JH NMR of Form Bl showed a ratio of 0.3:1 (CHCl3/Tegaserod). Tegaserod maleate Form Bl may be prepared by crystallization out of chloroform, optionally in a mixture with a Ci to C* alcohol. In a preferred embodiment, crystallization is induced by lowering of the temperature to about 30 to 50EC. A mixture that may be used is that of chloroform and ethanol. Tegaserod maleate Form B2 The typical DSC curve of tegaserod form B2 shows one endothermic peak at about 140°C due to desolvation and transformation to Form A, and one endothermic peak at about 185-188°C due to melting of Form A. Form B2 contains 0.9% water (by Karl fisher) and shows a TGA curve with 4% weight loss step. Form B2 is an ethanolate (theoretical value of 1/3 ethanolate is 3.5%). Tegaserod maleate Form B2 may be prepared by slurry of another form of tegaserod maleate, preferably Form A, in ethanol, optionally in a mixture with water. A preferred mixture is up to about 20% water by volume, with about 5% water being preferred. The slurry process may be carried out at room temperature for about 12 to 24 hours. Form B2 may also be prepared from a slurry or solution of tegaserod maleate an ethanol containing solution. The slurry or solution may be cooled in order to induce crystallization. The ethanol solution preferably contains at least about 80% ethanol by volume, and preferably at least one of methanol, ethyl acetate and water. Tegaserod maleate Form B3 The typical DSC curve of tegaserod Form B3 shows one endothermic peak at about 140°C due to desolvation and transformation to Fonn A, and one endothermic peak at about 185-188°C due to melting of Form A. Form B3 is also an ethanol solvated form (about 5% weight loss by TGA, which corresponds to hemi-ethauolate- stochiometric value for hemi-ethanolate: 5.2%). Form B3 may generally be prepared by crystallization from an ethanol containing solution, slurry in ethanol or absorption of ethanol vapors. The solution may contain preferably at least about 80% ethanol, and preferably at least one of methanol, ethyl acetate and water. Tegaserod maleate Form C The typical DSC curve of tegaserod Form C shows one or more small endothermic peaks below 160°C and a multiple event above 170°C due to a transformation to Form A, and one endothermic peak at about 185-188°C due to melting of Form A. Form C may contain up to 2% water (by Karl Fisher). Form C may also be prepared by drying Form B2 under ambient or reduced pressure, preferably under reduced pressure at a temperature of about 30°C to about 50°C for about 12 to 24 hours. Tegaserod maleate Form D Tegaserod maleate Form D may be prepared by slurry or crystallization from l-methyl-2-pyrrolidone, n-propanol or mixtures thereof. The slurry is preferably continued for a day at about room temperature. Crystallization of Form D is preferably carried out without rapid precipitation by addition of an anti-solvent, in * *• that such process may result in formation of Form A. Heating of Form D causes a transformation to Form A. Form D is preferably heated to a temperature of at least about 30EC, more preferably about 40EC for about a day. Since Form A exhibits thermal stability at higher temperatures, it is possible to use higher temperatures to cause the transformation. The term "stable" as used herein refers to a polymorphic change of less than about 5% by weight, more preferably less than about 2% by weight. Tegaserod maleate Form E The typical DSC curve of tegaserod Form E shows one endothermic peak at about 130°C due to a solid-solid transformation to Form A and one endothermic peak at about 185-188°C due to melting of Form A. Form E may be a dioxane solvated form (about 9.5% weight loss by TGA, which corresponds to hemi-dioxane solvate -stochiometric value: 9.5%). Tegaserod maleate Form E may generally be prepared by slurry of tegaserod Form A in dioxane. The slurry process is preferably carried out at a temperature of about 20°C to about 30°C for about 12 to 24 hours. Tegaserod maleate Form E may also be prepared by combining tegaserod base with a solution of maleic acid in THF. Tegaserod hemi-maleate The other forms of tegaserod maleate described herein have a 1:1 molar ratio of tegaserod to maleate. We have also discovered an additional form that is a hemi-maleate, i.e., it has a 2:1 molar ratio of tegaserod to maleate. The typical DSC curve of tegaserod hemi-maleate shows a broad endotherm below 140EC due to solvent desorption, and a melting endotherm at about 150 degrees. Tegaserod herni-maleate is a hemihydrate (about 2.5% weight loss of water by both TGA and Kail Fisher, which corresponds to the hemihydrate). In addition, the structure was confirmed according to an HPLC assay: tegaserod in the sample was measured to be 81.18 % (calculated 81.79%) and maleic acid in the sample was measured to be 16.01% (calculated value: 15.76%). Tegaserod hemi-maleate may be prepared by combining tegaserod base with a solution of maleic acid in ethyl acetate and water. The reaction mixture is preferably heated, more preferably to at least about 40°C, and most'preferably to at least about 65°C. Preferably, ethyl acetaterwater ratio is about 97:1 to about 97:5, more preferably about 97:3 (v/v). The hemi-maleate is recovered as a precipitate. Tegaserod hemi-maleate prepared by this process may be recovered by filtration, and dried at a temperature of at least 40°C in a vacuum oven for about 12 to about 24 hours. Tegaserod base Form F The typical DSC curve of tegaserod base Form F has one endothermic peak at about 154°C. Tegaserod base Form F may generally be prepared by dissolving tegaserod in a chlorinated hydrocarbon (Ci to Cg are the practical hydrocarbons), e.g. chloroform and dichloromethane, preferably dichloromethane; and removing the chlorinated hydrocarbon. Removing is preferably carried oukby evaporation. The process may further comprise preliminary steps of distributing tegaserod maleate between an. aqueous phase and the hydrocarbon, contacting the maleate with a base, and recovering the hydrocarbon containing tegaserod. Weak bases such as amines are preferred. Most preferred bases are Cl to C6 dialkylamines. Preferably the chlorinated hydrocarbon is dichloromethane. Optionally the removing step is carried out under reduced pressure. Tegaserod base form H The typical DSC curve of tegaserod base Form H has two endothermic peaks. The first appears at about 134°C, and the second at about 156°C, probably due to polymorphic conversion. Tegaserod maleate Form H may generally be prepared by precipitation, such as by dissolving tegaserod base in a d to C* alcohol, combining the alcohol with an antisolvent and recovering the crystalline form as a precipitate. Preferably the alcohol is ethanol and the anti-solvent is water. Tegaserod base Form H may also be prepared by slurry in ethyl acetate under conditions such that ethyl acetate does not hydrolyze. Tegaserod base amorphous The typical DSC curve of tegaserod base amorphous has broad endotherms below about 100°C and two endothermic peaks at about 132°C and 156°C. Amorphous tegaserod base may be prepared by solvent removal from a solution of tegaserod in a Ci to C4 alcohol, preferably methanol or ethanol. Preferably, solvent removal is carried out by evaporation. The evaporation process may be accelerated by heating and reducing the pressure. Evaporation is preferably carried out under vacuum at a temperature of about 50EC to about 70EC until no solvent is observed. Amorphous tegaserod maleate of the present invention preferably contains less than about 20% crystalline tegaserod, more preferably less than 10%, wt/wt, and most preferably less than about 5% wt/wt. Presence of amorphous form may be detected by lack of peaks in a powder XRD pattern or lack of a melting point in a DSC thermogram. The area under the peaks in an XRD pattern may be added to obtain total amount of crystalline material. With DSC, presence of endotherms may point to melting of crystalline material. Tegaserod acetate Form J The present invention also provides for tegaserod acetate. Tegaserod acetate has not previously been reported in the literature. The typical DSC curve of tegaserod Form J does not show any melting point in the range of 140 degrees. Form J of tegaserod acetate is anhydrous (less than about 0.1% weight loss by TGA). Additionally, tegaserod acetate Form J was characterized by elemental analysis; Anal. Calcd for C18H27N5O3: C, 59.81; H, 7.53; N, 19.38. Found: C, 59.64; H, 7.49; N, 19.34. Tegaserod acetate Form J is less soluble than tegaserod base. Tegaserod acetate Form J may be prepared by mixing tegaserod base or tegaserod maleate or another salt of tegaserod in the presence of a base, with ethyl acetate under conditions where the ethyl acetate hydrolyzes, to form a slurry, and recovering the crystalline form. Hydrolysis for example can be induced by the tegaserod base present in the reaction mixture. Alternatively, acetic acid may be used instead of ethyl acetate. Form J may also be obtained by heating the mixture of tegaserod base and ethyl acetate to a high temperature such as reflux. Heating It was found that forms B, B2 and C transform to Form A upon hearing: (Table Removed) Form B may transform to Form C upon heating before it transforms to Form A It is assumed that Forms Bl, B3, E transform to Form A upon heating, from observation of the DSC curves, in which all the forms have the melting peak of Form A. Another form that shows a transformation with heating is Form D. Form D transforms to Form A upon heating. The starting material used for the processes of the present invention may be any crystalline or amorphous form of tegaserod base or maleate, including various solvates and hydrates. With crystallization processes, the crystalline form of the starting material does not usually affect the final result. With trituration, the final product may vary depending on the starting material. One of skill in the art would appreciate the manipulation of the starting material within skill in the art to obtain a desirable form with trituration. The present invention is not limited to the starting form used for trituration unless if such form is essential for obtaining another form. Many processes of the present invention involve crystallization out of a particular solvent, i.e., obtaining a solid material from a solution. One skilled in the art would appreciate that the conditions concerning crystallization may be modified without affecting the form of the polymorph obtained. For example, when mixing tegaserod or its maleate in a solvent to form a solution, wanning of the mixture may be necessary to completely dissolve the starting material. If warming does not clarify the mixture, the mixture may be diluted or filtered. To filter, the hot mixture may be passed through paper, glass fiber or other membrane material, or a clarifying agent such as celite. Depending upon the equipment used and the concentration and temperature of the solution, the filtration apparatus may need to be preheated to avoid premature crystallization. The conditions may also be changed to induce precipitation. A preferred way of inducing precipitation is to reduce, the solubility of the solvent. The solubility of the solvent may be reduced, for example, by cooling the solvent. In one embodiment, an anti-solvent is added to a solution to decrease its solubility for a particular compound, thus resulting in precipitation. Another way of accelerating crystallization is by seeding with a crystal of the product or scratching the inner surface of the crystallization vessel with a glass rod. Other times, crystallization may occur spontaneously without any inducement. The present invention encompasses both embodiments where crystallization of a particular form of tegaserod occurs spontaneously or is induced/accelerated, unless if such inducement is critical for obtaining a particular form. A solid maybe recovered from a reaction mixture in a routine fashion such as by filtration, centrifugation or decanting. Tegaserod maleate or base of defined particle size may be produced by known methods of particle size reduction starting with crystals, powder aggregates and course powder of the new crystalline forms of tegaserod maleate. The principal operations of conventional size reduction are milling of a feedstock material and sorting of the milled material by size. A fluid energy mill, or micronizer, is an especially preferred type of mill for its ability to produce particles of small size in a narrow size distribution. As those skilled in the art are aware, micronizer^use the kinetic energy of collision between particles suspended in a rapidly moving fluid stream to cleave the particles. An air jet mill is a preferred fluid energy mill. The suspended particles are injected under pressure into a recirculating particle stream. Smaller particles are carried aloft inside the mill and swept into a vent connected to a particle size classifier such as a cyclone. The feedstock should first be milled to about 150 to 850 um which may be done using a conventional ball, roller, or hammer mill. The polymorphic forms forms of the present invention have a maximal particle size of below about 250u, more preferably below about 200u, most preferably below about 1 OOu, One of skill in the art would appreciate that some crystalline forms may undergo a transition to another form during particle size reduction. Pharmaceutical compositions may be prepared as medicaments to be administered orally, parenterally, rectally, transdermally, bucally, or nasally. Suitable forms for oral administration include tablets, compressed or coated pills, dragees, sachets, hard or gelatin capsules, sub-lingual tablets, syrups and suspensions. Suitable forms of parenteral administration include an aqueous or non-aqueous solution or emulsion, while for rectal administration suitable forms for administration include suppositories with hydrophilic or hydrophobia vehicle. For topical administration the invention provides suitable transdermal delivery systems known in the art, and for nasal delivery there are provided suitable aerosol delivery systems known in the art. Pharmaceutical formulations of the present invention contain the above disclosed polymorphic forms of tegaserod base or maleate. The pharmaceutical composition may contain only a single form of tegaserod base, maleate or acetate, or a mixture of various forms of tegaserod maleate, with or without amorphous form. In addition 10 the active ingredient(s), the pharmaceutical compositions of the present invention may contain one or more excipients or adjuvants. Selection of excipients and the amounts to use may be readily determined by the formulation scientist based upon experience and consideration of standard procedures and reference works in the field. Diluents increase the bulk of a solid pharmaceutical composition, and may make a pharmaceutical dosage form containing the composition easier for the patient and care giver to handle. Diluents for solid compositions include, for example, microcrystalline cellulose (eE methyl ethyl ketone (70) 56% A Terrahydrofuran (40) 83% E»A ethyl lactate (25) 46% A ethyl acetate (25) 39% A Example 23: Preparation of Tegaserod Hemi-maleate hemihydrate. A solution of maleic acid (2.32 g in 22 mL ethyl acetate/water 97:3) was added to a mixture of tegaserod base in ethyl acetate, and the reaction mixture was heated to 65 °C and stirrer overnight. The resulting solid was filtered off and washed with water and ethyl acetate. Drying in vacuum oven at 40 °C for 16 hours gives 12.19 g of Tegaserod hemi-maleate hemihydrate. Depending on the base polymorph used a solution or slurry is obtained. When using amorphous tegaserod base, a solution is obtained, while when using any other base polymorph of tegaserod, a slurry is obtained. TEGASEROD FREE BASE AMORPHOUS Example 24: Preparation of Tegaserod free base amorphous. Tegaserod free base (1 g) was dissolved in 40 mL methanol and evaporated to dryness at 60 °C under vacuum. The resulting solid was analyzed to yield amorphous tegaserod free base. Having thus described the invention with reference to particular preferred embodiments and illustrative examples, those in the art may appreciate modifications to the invention as described and illustrated that do not depart from the spirit and scope of the invention as disclosed in the specification. The Examples are set forth to aid in understanding the invention but are not intended to, and should not be construed to, limit its scope in any way. The examples do not include detailed descriptions of conventional methods. Such methods are well known to those of ordinary skill in the art and are described in numerous publications. Polymorphism in Pharmaceutical Solids, Drugs and the Pharmaceutical Sciences, Volume 95 may be used as a guidance. What is claimed is: 1. A process for preparing crystalline form of tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 5.4, 6.0, 6.6 and 10.8 ±0.2 degrees two theta (Form A) comprising: c) preparing a solution of tegaserod maleate in an solvent; and d) recovering the crystalline form as a precipitate. wherein the solvent is selected from the group consisting of acetonitrile, butyl lactate, methyl ethyl ketone, butariol, dioxane, ethanol, isopropanol, chloroform, ethoxyethanol, 2-ethoxyethanol, pyrolidone, dimethyl sulfoxide, N,N-Dimethylformamide, l-methyl-2-pyrrolidone, N,N-Dimethylacetamide, water and mixtures thereof, with the proviso that water is not used as an individual solvent. 2. The process of claim 1, wherein precipitation is induced by cooling the solution. 3. The process of claim 1, wherein precipitation is induced by adding an anti- solvent. 4. The process of claim 3, wherein the anti-solvent is water. 5. A process for preparing crystalline tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 5.4, 6.0, 6.6 and 10.8 ±0.2 degrees two theta (Form A) comprising heating a solvate of tegaserod maleate to cause desolvation. 6. A process for preparing crystalline form of tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 5.4,6.0, 6.6 and 10.8 ±0.2 degrees two theta (Form A) comprising: c) combining a solution of maleic acid in a solvent with a solution of tegaserod free base in the same or different solvent; and d) recovering the crystalline form as a precipitate. wherein the solvent is selected from the group consisting of acetonitrile, n-butanol, dioxane, methyl ethyl ketone, ethyl lactate, ethyl acetate and water. 7. A crystalline form of tegaserod maleate (Form B) characterized by an X-ray Diffraction pattern having peaks at 15.7,16.9,17.2,24.1, 24.6 and 25.2±0.2 two theta. 8. The crystalline form of claim 7, further characterized by an X-ray Diffraction pattern having peaks at 7.1, 7.9,19.5,20.7,21.6,23.2, 24.1,24.6,25.2,25.9, 27.8,28.8,29.4 and 30.7±0.2 two theta. 9. The crystalline form of claim 8, wherein the crystalline form has an X ray diffraction pattern as substantially depicted in figure 2. 10. The crystalline form of claim 7, wherein the crystalline form is 1-propanol solvate. 11. The crystalline form of claim 7, wherein the crystalline form has a particle size of below about 250|i and a polymorphic purity of at least about 95% as measured by area percentage XRD. 12. The crystalline form of claim 7, characterized by a DSC with an endothermic peak at about 140EC, and another endothermic peak at about 185 to about 188EC. 13. A process for preparing the crystalline form of claim 7 comprising slurrying a tegaserod maleate in solid state in 1-propanol, and recovering the crystalline form. 14. The process of claim 13, wherein the tegaserod maleate in the solid state is characterized by an X-ray Diffraction pattern having peaks at 5.4, 6.0,6.6 and 10.8 ±0.2 degrees two theta (Form A). 15. A crystalline form of tegaserod maleate (Form B1) characterized by an X-ray Diffraction pattern having peaks at 10.3,16.1,16.5,17.1,20.3, 22.0, and 25.3 ±0.2 two theta. 16. The crystalline form of claim 15, further characterized by peaks at 13.9,15.5, 19.5,20.9,23.1,24.2,26.7,27.9,28.7 and 30.4 ±0.2 two theta. 17. The crystalline form of claim 16, wherein the crystalline form has an X ray diffraction pattern as substantially depicted in figure 3. 18. The crystalline form of claim 15, wherein the crystalline form is a CHCla solvate. 19. The crystalline form of claim 15, characterized by a DSC with an endothermic peak at about 140EC, and another endothermic peak at about 185 to about 188EC. 20. The crystalline form of claim 15, wherein the crystalline form has a particle size of below about 250p, and a polymorphic purity of at least about 95% as measured by area percentage XRD. 21. A process for preparing crystalline form of claim 15 comprising: c) preparing a solution of tegaserod maleate in chloroform, optionally in mixture with methanol or ethanol; and d) recovering the crystalline form as a precipitate. 22. Crystalline tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 8.7,15.6, 16.0,22.2,25.3 and ±0.2 two theta (Form B2), wherein the crystalline form is an ethanolate solvate. 23. A process for preparing the crystalline form of claim 22 comprising: c) slurrying a crystalline form of tegaserod maleate in ethanol; and d) recovering the crystalline tegaserod maleate. 24. The process of claim 23, wherein the crystalline form slurried is characterized by an X-ray Diffraction pattern having peaks at 5.4,6.0,6.6 and 10.8 ±0.2 degrees two theta (Form A). 25. The process of claim 23, further comprising water, methanol, ethyl acetate or mixtures thereof in mixture with the ethanol. 26. The process of claim 23, further comprising heating the slurry, and adding an additional amount of ethanol. 27. A crystalline form of tegaserod maleate (Form B3) characterized by an X-ray Diffraction pattern having peaks at 15.6,16.0,22.5,25.5 and 29.3 ±0.2 two theta. 28. The crystalline form of claim 27, further characterized by peaks at 7.2, 8.0,10.3, 16.8,17.3,19.6,20.7,21.6, 23.3,24.5,26.0,27.2 and 28.0±0.2 two theta. 29. The crystalline form of claim 28, wherein the crystalline form has a X-ray diffraction pattern as substantially depicted in figure 5. 30. The crystalline form of claim 27, wherein the crystalline form is an ethanol solvate. 31. The crystalline form of claim 27, characterized by a DSC with an endothermic peak at about 140°C, and another endothermic peak at about 185 to about 188°C. 32. The crystalline form of claim 27, wherein the crystalline form has a particle size of below about 250jj, and a polymorphic purity of at least about 95% as measured by area percentage XRD. 33. A process for preparing the crystalline form of claim 27 comprising crystallizing the crystalline form from ethanol, or slurrying tegaserod maleate in ethanol or contacting tegaserod maleate with vapors of ethanol. 34. The process of claim 33, wherein at least one of water or methanol are present in addition to ethanol. 35. A process for preparing the crystalline form of claim 27 comprising: c) combining a solution of maleic acid in ethanol with a solution of tegaserod free base in ethanol; and d) recovering the crystalline form as a precipitate. 36. A process for preparing crystalline tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 7.8, 8.7,17.1,17.3 and 25.1 ±0.2 two theta (Form C) comprising heating crystalline tegaserod maleate characterized by an XRD pattern with peaks at 8.7,15.6,16.0,22.2,25.3 and ±0.2 two theta (Form B2) at a temperature of at least about 40°C. 37. A crystalline form of tegaserod maleate (Form D) having an X-ray powder diffraction with peaks at about 14.6,20.2,23.8,26.0,28.6 and 29.3±0.2 two theta. 38. The crystalline form of claim 37, further characterized by peaks at 11.1,17.1, 17.7,21.6,22.6,24.9,25.2,27.3, 31.0,33.9 and 35.8±0.2 two theta. 39. The crystalline form of claim 38, wherein the crystalline form has an X-ray difraction pattern as substantially depicted in figure 7. 40. The crystalline form of claim 37, wherein the crystalline form has a particle size of below about 250p and a polymorphic purity of at least about 95% as measured by area percentage XRD. 41. A process for preparing the crystalline form of claim 37, comprising slurrying or crystallizing the crystalline form in a solvent selected from the group consisting of l-methyl-2-pyrrolidone, n-propanol and mixtures thereof. 42. A crystalline fonn of tegaserod maleate (Form E) having an X-ray powder diffraction with peaks at 10.3,16.6,17.1,22.0 and 25.4±0.2 two theta. 43. The crystalline form of claim 42, further characterized by peaks at 7.9,15.9, 19.5,20.6,21.4,22.4, 23.4, 24.4,26.0,28.0,28.5 and 29.3 ±0.2 two theta. 44. The crystalline form of claim 43, wherein the crystalline form has a X-ray diffraction pattern as substantially depicted in figure 8. 45. The crystalline form of claim 42, wherein the crystalline form has a particle size of below about 250^ and a polymorphic purity of at least about 95% as measured by area percentage XRD. 46. The crystalline form of claim 42, wherein the crystalline form is a dioxane solvate. 47. The crystalline form of claim 42, characterized by a DSC with an endothermic peak at about 130EC, and another endothermic peak at about 185 to about 188EC. 48. A process for preparing the crystalline form of claim 42 comprising: c) slurrying tegaserod maleate in dioxane; and d) recovering the crystalline form. 49. The process of claim 48, wherein the tegaserod maleate in step a) is characterized by an X-ray Diffraction pattern having peaks at 5.4, 6.0,6.6 and 10.8 ±0.2 degrees two theta (Form A). 50. A process for preparing the crystalline form of claim 42 comprising: a) combining a solution of maleic acid in tetrahydrofuran with a solution of tegaserod free base in tetrahydrofuran; and b) recovering the crystalline form as a precipitate. 51. A crystalline form of tegaserod hemi-maleate having an X-ray powder diffraction with peaks at 5.0, 9.9,19.8, and 25.9±0.2 two theta. 52. The crystalline form of claim 51, wherein the crystalline form is characterized by peaks at 14.2,14.8,20.8, 21.5,23.1 and 23.8±0.2 two theta. 53. The crystalline form of claim 52, wherein the crystalline form has an X-ray diffraction pattern as substantially depicted in figure 13. 54. The crystalline form of claim 51, wherein the crystalline form is a hemihydrate. 55. A process for preparing crystalline form of claim 50 comprising: d) combining tegaserod base, maleic acid and ethyl acetate to obtain a reaction mixture; e) heating the reaction mixture; and f) recovering the crystalline form as a precipitate. 56. The process of claim 55, wherein water is added in step a). 57 A crystalline form of tegaserod base (Form F) having an X-ray powder diffraction with peaks at 10.2,11.3,20.3,21.3, 21.8,27.6,29.6,31.1 and 32.7±0.2 two theta. 58. The crystalline form of claim 57, further characterized by peaks at 10.2,11.3, 15.3,16.9,18.3,19.2,20.3,21.3,21.8,22.7,24.4,27.6,29.6, 31.1 and32.7±0.2 two theta. 59. The crystalline form of claim 58, wherein the crystalline form has an X-ray diffraction pattern as substantially depicted in figure 9. 60. The crystalline form of claim 57, wherein the crystalline form has a particle size of below about 250^ and a polymorphic purity of at least about 95% as measured by area percentage XRD. 61. The crystalline form of claim 57, characterized by a DSC with an endothermic peak at about 154EC. 62. A process for preparing the crystalline form of claim 5 7, comprising: c) preparing a solution of tegaserod in a C1 to C8 chlorinated aliphatic hydrocarbon; and d) removing the chlorinated hydrocarbon. 63. The process of claim 62, wherein the chlorinated hydrocarbon is dichloromethane. 64. The process of claim 62, wherein removing is carried out by evaporation. 65. The process of claim 62, further comprising preliminary steps of distributing tegaserod maleate characterized by an X-ray Diffraction pattern having peaks at 5.4, 6.0, 6.6 and 10.8 ±0.2 degrees two theta (Form A) between an aqueous phase and the hydrocarbon, contacting the maleate with a base, and recovering the hydrocarbon containing tegaserod. 66. A crystalline form of tegaserod base (Form H) having an X-ray powder diffraction with peaks at 8.8,15.1,17.6,21.8 and 23.9±0.2 two theta. 67. The crystalline form of claim 66, wherein the crystalline form is characterized by peaks at 7.7,11.9,16.0,16.8, 18.1,19.3,22.7,25.4, 26.5 and 29.8±0.2 two theta. 68. The crystalline form of claim 67, wherein the crystalline form has an X-ray diffraction pattern as substantially depicted in figure 10. 69. The crystalline form of claim 66, wherein the crystalline form has a particle size of below about 250u. and a polymorphic purity of at least about 95% as measured by area percentage XRD. 70. The crystalline form of claim 66 characterized by a DSC with an endothermic peak at about 134°C, and another endothermic peak at about 156°C. 71. A process for preparing crystalline form of claim 66 comprising: c) preparing a solution of tegaserod base in ethanol; and d) recovering the crystalline form as a precipitate. 72. The process of claim 71, wherein precipitation is induced by combining the solution with an anti-solvent. 73. The process of claim 72, wherein the anti-solvent is water. 74. A process for preparing crystalline form of claim 66 comprising: c) slurrying tegaserod base in ethyl acetate; and d) recovering the crystalline form from the slurry. 75. Amorphous tegaserod base in the solid state. 76. Amorphous tegaserod of claim 75, wherein the amorphous tegaserod contains less than 10% by weight crystalline tegaserod. 77. The tegaserod of claim 75, wherein the tegaserod has an X-ray diffraction pattern as substantially depicted in figure 11. 78. The amorphous tegaserod base of claim 75, characterized by a DSC with an endothermic peak at about 100°C, and other endothermic peaks at about 156°C and about 132°C. 79. Amorphous tegaserod of claim 75, wherein the amorphous form has a particle size of below about 250u, and contains less than about 95% crystallinity as measured by area percentage XRD. 80. A process for preparing amorphous tegaserod of claim 75 comprising: c) preparing a solution of tegaserod in an organic solvent; and d) removing the solvent. 81. The process of claim 80, wherein the organic solvent is a Ci to C4 alcohol. 82. The process of claim 80, wherein removing is carried out by evaporation. 83. Tegaserod acetate in solid state. 84. Crystalline acetate. 85. Crystalline form of tegaserod acetate (Form J) having an X-ray powder diffraction with peaks at about 7.3, 8.7,10.9 and 13.5±0.2 two theta. 86. The crystalline form of claim 85, further characterized by peaks at about 18.2, 18.9,21.8,23.1 and 24.4±0.2 two theta. 87. The crystalline form of claim 86, wherein the crystalline form has an X-ray diffraction pattern as substantially depicted in figure 12. 88. A process for preparing the tegaserod acetate of claim 85 comprising: c) combining tegaserod salt or base, ethyl acetate or acetic acid, and a base under aqueous condition to obtain a reaction mixture; and d) recovering the crystalline form. 89. The process of claim 88, wherein the base is sodium hydroxide and the tegaserod salt is tegaserod maleate. 90. A process for preparing the tegaserod acetate of claim 85 comprising: c) slurrying tegaserod base amorphous in ethyl acetate; and d) recovering the crystalline form. 91. A pharmaceutical composition comprising a polymorphic form of tegaserod base, maleate or acetate selected from the group consisting of B, Bl, B3, D, E, J, tegaserod hemimaleate and a pharmaceutically acceptable excipient. 92. A method of treating a mammal suffering from irritable bowel syndrome comprising administering the pharmaceutical composition of claim 91 to the mammal in need thereof. 93. A solvate of tegaserod maleate, wherein the maleate is a solvate of a solvent selected from the group consisting of ethanol, isopropanol, 1-propanol, chloroform and dioxane. 94. A pharmaceutical composition comprising a polymorphic form of tegaserod base or maleate selected from the group consisting of B, Bl, B3, D, E, J, tegaserod hemimaleate for use in treatment of irritable bowl syndrome.