add gittip to readme
add gittip to readme

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