DESCRIPTION FACILITY FOR PRODUCTION OF HIGH STRENGTH STEEL SHEET OR HOT DIP ZINC COATED HIGH STRENGTH STEEL SHEET EXCELLENT IN ELONGATION AND HOLE EXPANDABILITY TECHNICAL FIELD The present invention relates to a facility for production of high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandability. BACKGROUND ART In recent years, improvement of the fuel economy of motor vehicles and reduction of the weight of vehicle chasses have been demanded more strongly. To lighten weight, the need for high strength steel sheet has been rising. However, the higher the strength, the more difficult the formability becomes. In particular, the steel material falls in elongation. Further, depending on the member, there are quite a few parts where burring is performed to expand a machined hole to form a flange. Hole expandability also is starting to be demanded as an important characteristic. Therefore, to satisfy this demand, Japanese Patent Publication (A) No. 2001-192768, Japanese Patent Publication (A) No. 2001-200338, Japanese Patent Publication (A) No. 2001-3150, Japanese Patent Publication (A) No. 2001-207235, Japanese Patent Publication (A) No. 2001-207236, Japanese Patent Publication (A) No. 2002-38248, Japanese Patent Publication (A) No. 2002-309334, and Japanese Patent Publication (A) No. 2002-302734 propose to improve the hole expandability in TRIP steel or composite structure steel sheet by the technique of using tempered martensite and conducting annealing heat treatment twice. In this way, high strength steel sheet for which hole expandability is required is increasingly being given hot dip zinc coatings. On the other hand, there is also demand for high hole expandability high strength steel sheet without hot dip zinc coatings. In addition, relatively soft steel sheet used in the past for exterior panels of motor vehicles and steel sheet with extremely large deep drawability used for oil pans etc. have to be regularly produced. To produce such a large number of diverse types of steel sheet stably and efficiently, with a conventional single-objective type of continuous annealing facility continuously annealing steel sheet or a continuous annealing hot dip zinc coating facility able to continuously treat steel from annealing to hot dip zinc coating by a series of facilities, a plurality of such facilities have to be combined and passed through. This gives rise the problems of additional construction of facilities, lengthening of the production time, and increase in the production costs. DISCLOSURE OF THE INVENTION The present invention provide a facility able to efficiently produce, both cost-wise and time-wise, high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandability used for auto parts etc. The inventors studied facilities for the production of high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandability and as a result learned that by arranging in a continuous annealing facility or hot dip zinc coating facility or their joint facility or continuously with the same a quenching facility able to cool annealed steel sheet down to a temperature region of the martensite transformation point or less and a tempering facility for tempering the steel sheet and holding it in temperature enables the amount of tempered martensite to be freely controlled and is extremely important in securing and improving the elongation and hole expandability. That is, in the present invention, unlike the case where the quenching facility and the tempering facility are in separate production lines and a sheet is cooled down to ordinary temperature once between the quenching and tempering, by providing a series of continuous treatment facilities, it is possible to freely control the quenching/tempering temperature and possible to freely control the amount of tempered martensite, which plays a large role in the securing and improvement of the elongation and hole expansion rate, and the tensile strength. The gist of the present invention is as follows: (1) A production facility for high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandability characterized by arranging in a continuous annealing facility or a continuous hot dip zinc coating facility or their joint facility or continuously with the same a quenching facility able to cool steel sheet after recrystallization or after recrystallization and after hot dip zinc coating down to a temperature region of the martensite transformation point or less, a tempering facility for tempering the steel sheet and holding its temperature, and a recooling facility for cooling the steel sheet to 100°C or less. (2) A production facility for composite high strength steel sheet or hot dip zinc coated high strength steel sheet excellent in elongation and hole expandability as set forth in (1) characterized in that a tempering temperature rise AT between the quenching facility and the tempering facility falls in a range of the following relationship (A) found from the post- tempering tensile strength TS and hole expansion rate X and in that a pre-tempering temperature T (°C) falls in a range of the following relationship (B) found from the post-tempering tensile strength TS and hole expansion rate λ. 0.028(1-28)TS-11.5λ-40