Add Rails 3 install instructions to README
Add Rails 3 install instructions to README

wuwx/forem,jarray52/forem,rubysherpas/forem,radar/forem,frankmarineau/forem,jaybrueder/forem,brooks/forem,devleoper/forem,bodrovis/forem,rubysherpas/forem,zhublik/forem,tomrc/forem,mhoad/forem,hanspolo/forem,ajeje/forem,zhublik/forem,ketanjain/forem,rubysherpas/forem,RostDetal/forem,ajeje/forem,efrence/forem,efrence/forem,devleoper/forem,SamLau95/forem,efrence/forem,trakt/forem,ajeje/forem,nikolaevav/forem,jarray52/forem,RostDetal/forem,hanspolo/forem,bodrovis/forem,ketanjain/forem,jaybrueder/forem,trakt/forem,SamLau95/forem,frankmarineau/forem,zhublik/forem,wuwx/forem,mhoad/forem,brooks/forem,ketanjain/forem,tomrc/forem,trakt/forem,hanspolo/forem,nikolaevav/forem,RostDetal/forem,frankmarineau/forem,devleoper/forem,wuwx/forem,jaybrueder/forem,radar/forem,radar/forem,tomrc/forem,nikolaevav/forem