README update.
README update.

Takes out documentation for Merit::Score.top_scored.

It should live in a wiki page, outside of merit's repository. See
https://github.com/tute/merit/issues/111#issuecomment-34876788

raderj89/merit,hw676018683/merit,caiqinghua/merit,hw676018683/merit,woopasoft/merit,caiqinghua/merit,michael-gabenna/merit,michael-gabenna/merit,iagopiimenta/merit,hw676018683/merit,pablobfonseca/merit,woopasoft/merit,michael-gabenna/merit,raderj89/merit,pablobfonseca/merit,caiqinghua/merit,iagopiimenta/merit,iagopiimenta/merit,woopasoft/merit,pablobfonseca/merit,raderj89/merit