Add Rubinius to Build Matrix with Allowed Failure
Add Rubinius to Build Matrix with Allowed Failure

Please add Rubinius to the build matrix with failure allowed.
88rabbit/rake,taiganakagawa/rake,bentley/rake,Vanzct/rake,utilum/rake,esasse/rake,ruby/rake,envato/rake,codedogfish/rake,ruby/rake,tmornini/rake,envato/rake,zzak/rake,jaustinhughey/rake,askl56/rake,pjump/rake,ipmobiletech/rake