Add YARD.ruby2? for Ruby 2.0 checking
Add YARD.ruby2? for Ruby 2.0 checking

jreinert/yard,jreinert/yard,herosky/yard,amclain/yard,amclain/yard,herosky/yard,ohai/yard,jreinert/yard,alexdowad/yard,iankronquist/yard,iankronquist/yard,amclain/yard,iankronquist/yard,lsegal/yard,ohai/yard,lsegal/yard,herosky/yard,thomthom/yard,alexdowad/yard,thomthom/yard,thomthom/yard,alexdowad/yard,ohai/yard,lsegal/yard