Update rails to version 4.2.0.rc3
Update rails to version 4.2.0.rc3

BryanH/follow-all,codeforamerica/follow-all,jasnow/follow-all,codeforamerica/follow-all,jasnow/follow-all,jasnow/follow-all,codeforamerica/follow-all,BryanH/follow-all,BryanH/follow-all