Updated travis to xcode 7
Updated travis to xcode 7

Kjuly/AFNetworking,maximmalygin/AFNetworking,guogh/AFNetworking,mhpavl/AFNetworking,gfiumara/AFNetworking,wymsee/AFNetworking,ewanmellor/AFNetworking,purdyk/AFNetworking,sergiou87/AFNetworking,Farteen/AFNetworking,E-B-Smith/AFNetworking,DevSonw/AFNetworking,SecuraSeal/AFNetworking,easyui/AFNetworking,wprice/AFNetworking,houweilei/AFNetworking,nonoBruce/AFNetworking,opentable/AFNetworking,sunkehappy/AFNetworking,kiurentu/AFNetworking,dilumn/AFNetworking,maximmalygin/AFNetworking,Juraldinio/AFNetworking,zhang-yawei/AFNetworking,matteonovelli/AFNetworking,mgv/AFNetworking,opentable/AFNetworking,Fitbit/AFNetworking,Farteen/AFNetworking,renssies/AFNetworking,yuewenyan/AFNetworking,dake/AFNetworking,RbBtSn0w/AFNetworking,renaudbuisine/MF_AFNetworking,FelixYin66/AFNetworking,SecuraSeal/AFNetworking,nonoBruce/AFNetworking,nonoBruce/AFNetworking,E-B-Smith/AFNetworking,yunzhongyoulong/AFNetworking,opentable/AFNetworking,wymsee/AFNetworking,Automatic/AFNetworking,guogh/AFNetworking,knutigro/AFNetworking,OmarPedraza/AFNetworking,kaybutter/AFNetworking,RbBtSn0w/AFNetworking,smule/AFNetworking,p4checo/AFNetworking,houweilei/AFNetworking,mhpavl/AFNetworking,Yincongxiao/AFNetworking,kevin-zqw/AFNetworking,BohemianCoding/AFNetworking,zhang-yawei/AFNetworking,adozenlines/AFNetworking,DevSonw/AFNetworking,jeremiahyan/AFNetworking,knutigro/AFNetworking,Kjuly/AFNetworking,Fitbit/AFNetworking,donholly/AFNetworking,0xced/AFNetworking,rocklive/AFNetworking,E-B-Smith/AFNetworking,iKorich/AFNetworking,yunzhongyoulong/AFNetworking,michal-olszewski/AFNetworking-CustomCallbacks,AFNetworking/AFNetworking,yuewenyan/AFNetworking,renaudbuisine/MF_AFNetworking,matteonovelli/AFNetworking,adozenlines/AFNetworking,Kjuly/AFNetworking,p4checo/AFNetworking,smule/AFNetworking,kiurentu/AFNetworking,rocklive/AFNetworking,michal-olszewski/AFNetworking-CustomCallbacks,wprice/AFNetworking,ewanmellor/AFNetworking,Yincongxiao/AFNetworking,purdyk/AFNetworking,AFNetworking/AFNetworking,Juraldinio/AFNetworking,wangxiaoxiang/AFNetworking,0xced/AFNetworking,NextThought/AFNetworking,Automatic/AFNetworking,AFNetworking/AFNetworking