update Gemfile to reflect rails 3.1 requirements
update Gemfile to reflect rails 3.1 requirements

headwayio/suspenders,nilbus/suspenders,elevatorup/eu-suspenders,zamith/suspenders,adarsh/suspenders,namuit/welaika-suspenders,mib32/suspenders,kvokka/suspenders,thoughtbot/suspenders,thoughtbot/suspenders,philosophie/suspenders,LiveTyping/suspenders,nilbus/suspenders,pacso/suspenders,mukkoo/welaika-suspenders,Mossio/hashira-rails,headwayio/voyage,namuit/welaika-suspenders,nplusp/suspenders,wizarddevelopment/bowties,kvokka/suspenders,elijahkim/suspenders,welaika/welaika-suspenders,CultivateLabs/jetfuel,headwayio/voyage,headwayio/voyage,headwayio/suspenders,zamith/suspenders,lorentrogers/suspenders,reshleman/suspenders,lorentrogers/suspenders,mib32/suspenders,namuit/welaika-suspenders,pacso/suspenders,mukkoo/welaika-suspenders,Mossio/hashira-rails,mariochavez/tirantes,LiveTyping/suspenders,headwayio/suspenders,jondot/suspenders,Mario245/suspenders,adarsh/suspenders,FlyoverWorks/jetfuel,elevatorup/eu-suspenders,brandoncordell/suspenders,EdinaVath/suspenders,kvokka/suspenders,mico/suspenders,toobulkeh/suspenders,LiveTyping/suspenders,mico/suspenders,netflower/netflower-suspenders,Mario245/suspenders,netflower/netflower-suspenders,cybrilla/suspenders,elevatorup/eu-suspenders,mib32/suspenders,wizarddevelopment/bowties,mukkoo/welaika-suspenders,pacso/suspenders,thoughtbot/suspenders,mariochavez/tirantes,nplusp/suspenders,askl56/suspenders,pineapplethief/suspenders,nplusp/suspenders,pedrosmmoreira/suspenders,zamith/suspenders,welaika/welaika-suspenders,toobulkeh/suspenders,EdinaVath/suspenders,headwayio/suspenders,Mossio/hashira-rails,Mossio/hashira-rails,pedrosmmoreira/suspenders,InnovativeOperations/suspenders,reshleman/suspenders,mariochavez/tirantes,askl56/suspenders,elijahkim/suspenders,pineapplethief/suspenders,CultivateLabs/jetfuel,pedrosmmoreira/suspenders,philosophie/suspenders,headwayio/voyage,reshleman/suspenders,wizarddevelopment/bowties,pineapplethief/suspenders,EdinaVath/suspenders,Mario245/suspenders,cybrilla/suspenders,mico/suspenders,philosophie/suspenders,askl56/suspenders,FlyoverWorks/jetfuel,brandoncordell/suspenders,CultivateLabs/jetfuel,nilbus/suspenders,FlyoverWorks/jetfuel,adarsh/suspenders,jondot/suspenders,toobulkeh/suspenders,welaika/welaika-suspenders,InnovativeOperations/suspenders,lorentrogers/suspenders,cybrilla/suspenders,InnovativeOperations/suspenders,delphaber/suspenders,delphaber/suspenders,LiveTyping/suspenders,brandoncordell/suspenders,delphaber/suspenders,elijahkim/suspenders