Added graceful handling of Gemfile syntax errors
Added graceful handling of Gemfile syntax errors

See issue #1527 for the initial request.

jasonkarns/bundler,anil826/bundler,simplybusiness/bundler,cdwort/bundler,EasonYi/bundler,asutoshpalai/bundler,dilumnavanjana/bundler,smlance/bundler,tgxworld/bundler,jaym/bundler,jingweno/bundler,patvice/bundler,ipmobiletech/bundler,PG-kura/bundler,sideci-sample/sideci-sample-bundler,rkh/bundler,smlance/bundler,mdorrance/bundler,mpapis/bundler,chef/bundler,chef/bundler,pjump/bundler,mattbrictson/bundler-1,cstrahan/bundler,cstrahan/bundler,gregkare/bundler,danimashu/bundler,mattbrictson/bundler-1,pivotal-cf-experimental/bundler,mvz/bundler,wenderjean/bundler,ipmobiletech/bundler,bundler/bundler,gregkare/bundler,CorainChicago/bundler,AiyionPrime/bundler,seanlinsley/bundler,r7kamura/bundler,asymmetric/bundler,jasonkarns/bundler,ligi/bundler,simplybusiness/bundler,steved/bundler,nju520/bundler,mpapis/bundler,jingweno/bundler,carpodaster/bundler,eagletmt/bundler,RochesterinNYC/bundler,pjump/bundler,ngpestelos/bundler,chulkilee/bundler,asymmetric/bundler,carpodaster/bundler,Teino1978-Corp/Teino1978-Corp-bundler,e2/bundler,dilumnavanjana/bundler,mdorrance/bundler,ngpestelos/bundler,Eric-Guo/bundler,h4ck3rm1k3/bundler,haonaturel/bundler,EthanK28/bundler,TimMoore/bundler,tgxworld/bundler,pivotal-cf-experimental/bundler,Wirachmat/bundler,bronzdoc/bundler,zhangkuaiji/bundler,asutoshpalai/bundler,roseweixel/bundler,elovelan/bundler,chulkilee/bundler,gentoo/bundler,sideci-sample/sideci-sample-bundler,anil826/bundler,elovelan/bundler,jaym/bundler,patvice/bundler,EthanK28/bundler,twcctz500000/bundler,kohgpat/bundler,bronzdoc/bundler,neslom/bundler,TimMoore/bundler,robinboening/bundler,christer155/bundler,RochesterinNYC/bundler,haonature/bundler,joshsoftware/bundler,neslom/bundler,Wirachmat/bundler,zhangkuaiji/bundler,agis-/bundler,mvz/bundler,nju520/bundler,bundler/bundler,haonature888/bundler,joshsoftware/bundler,kohgpat/bundler,danimashu/bundler,PG-kura/bundler,lmtim/bundler,robinboening/bundler,schaary/bundler,h4ck3rm1k3/bundler,frsyuki/bundler,christer155/bundler,byroot/bundler,haocafes/bundler,JuanitoFatas/bundler,frsyuki/bundler,seanlinsley/bundler,CorainChicago/bundler,lmtim/bundler,wenderjean/bundler,ximus/bundler,roseweixel/bundler,davydovanton/bundler,philnash/bundler,masarakki/bundler,agis-/bundler,davydovanton/bundler,steved/bundler,ximus/bundler,suhastech/bundler,Elffers/bundler,Teino1978-Corp/Teino1978-Corp-bundler,byroot/bundler,philnash/bundler,masarakki/bundler,AiyionPrime/bundler,Elffers/bundler,1337807/bundler,suhastech/bundler,Eric-Guo/bundler,EasonYi/bundler,ligi/bundler,schaary/bundler,cdwort/bundler,vemmaverve/bundler