update ruby version to 2.1.5
update ruby version to 2.1.5

tryshoppe/shoppe,jailalawat/shoppe_rails3,Invision70/shoppe,svenyurgensson/shoppe,mmanesh/shoppe,naikipl/core,hilquias/shoppe,denysnando/shoppe,denysnando/shoppe,likelazyeyes/shoppe,Invision70/shoppe,likelazyeyes/shoppe,juan267/shoppe,hilquias/shoppe,juan267/shoppe,jsantana90/shoppe,likelazyeyes/shoppe,adityasapate/shoppe,mmanesh/shoppe,brewbit/shoppe,diraulo/shoppe,PhdDone/shoppe,NerdsvilleCEO/shoppe,brewbit/shoppe,farukaydin/shoppe,jefferson/shoppe,tryshoppe/shoppe,adityasapate/shoppe,amaniak/shoppe,denysnando/shoppe,thierry-rietsch/shoppe,aniltimt/shoppe,thierry-rietsch/shoppe,jsantana90/shoppe,kylekthompson/kkt_shoppe,kylekthompson/kkt_shoppe,ParthivPatel-BTC/shoppe-gem,chrztoph/shoppe,naikipl/core,jsantana90/shoppe,allisonjulian/shoppe,allisonjulian/shoppe,juan267/shoppe,thierry-rietsch/shoppe,diraulo/shoppe,svenyurgensson/shoppe,mmanesh/shoppe,jailalawat/shoppe_rails3,PhdDone/shoppe,chrztoph/shoppe,NerdsvilleCEO/shoppe,ParthivPatel-BTC/shoppe-gem,Invision70/shoppe,aniltimt/shoppe,svenyurgensson/shoppe,ParthivPatel-BTC/shoppe-gem,aniltimt/shoppe,farukaydin/shoppe,adityasapate/shoppe,hilquias/shoppe,farukaydin/shoppe,jailalawat/shoppe_rails3,amaniak/shoppe,tryshoppe/shoppe,chrztoph/shoppe,jefferson/shoppe,diraulo/shoppe,NerdsvilleCEO/shoppe,allisonjulian/shoppe,PhdDone/shoppe,amaniak/shoppe,jefferson/shoppe,totalmeinhof/shoppe,totalmeinhof/shoppe,kylekthompson/kkt_shoppe,brewbit/shoppe,totalmeinhof/shoppe,naikipl/core