Don't overwrite BUNDLE_GEMFILE if it's already set
Don't overwrite BUNDLE_GEMFILE if it's already set

elcom/gitorious,elcom/gitorious,elcom/gitorious,gitorious/mainline,spencerwp/mainline,SamuelMoraesF/Gitorious,Gitorious-backup/mainline,rae/gitorious-mainline,tigefa4u/gitorious-mainline,rae/gitorious-mainline,elcom/gitorious,gitorious/mainline,SamuelMoraesF/Gitorious,gitorious/mainline,tigefa4u/gitorious-mainline,Gitorious-backup/mainline,rae/gitorious-mainline,SamuelMoraesF/Gitorious,SamuelMoraesF/Gitorious,gitorious/mainline,spencerwp/mainline,spencerwp/mainline,tigefa4u/gitorious-mainline,tigefa4u/gitorious-mainline,rae/gitorious-mainline,Gitorious-backup/mainline,Gitorious-backup/mainline,spencerwp/mainline