Updated the required version of Xcode 7 in the README.
Updated the required version of Xcode 7 in the README.

robskillington/Alamofire,tokorom/Alamofire,cmpt275group9/Alamofire,sarunw/Alamofire,gauravds/Alamofire,rjsamson/Alamofire,imjerrybao/Alamofire,suxinde2009/Alamofire,thebugcode/Alamofire,Karumi/Alamofire-Result,neugartf/Alamofire,john-langley/Alamofire,Koalappp/Alamofire,alex-learn/Alamofire,easyui/Alamofire,sai43/Alamofire,jmkr/Alamofire,yimajo/Alamofire,dandalf/Alamofire,tokorom/Alamofire,chokett/Alamofire,petereddy/Alamofire,revdotcom/Alamofire,alvincrisuy/Alamofire,ThornTechPublic/Alamofire,rain1988/Alamofire,MaWenxing/Alamofire,sai43/Alamofire,RyanCodes/Alamofire,i-miss-you/Alamofire,i-miss-you/Alamofire,red3/Alamofire,SampleLiao/Alamofire,Baza207/Alamofire,rain1988/Alamofire,ikesyo/Alamofire,ernestopino/Alamofire,yaoxiaoyong/Alamofire,AnthonyMDev/Alamofire,ikesyo/Alamofire,antigp/Alamofire,bscarano/Alamofire,Swiftosis/Alamofire,suxinde2009/Alamofire,cesar-oyarzun-m/Alamofire,lumenlunae/Alamofire,Noobish1/Alamofire,mcgrady20150318/Alamofire,libiao88/Alamofire,liuchungui/Alamofire,meteochu/Alamofire,brandenr/Alamofire,st3fan/Alamofire,kevin-zqw/Alamofire,MaWenxing/Alamofire,lclamotte/Alamofire,Screon/Alamofire,foxkillerli/Alamofire,Holmusk/Alamofire,muukii/Alamofire,ThornTechPublic/Alamofire,AnthonyMDev/Alamofire,followwind007/Alamofire,dgdosen/Alamofire,trauzti/Alamofire,yjkim/Alamofire,Swiftosis/Alamofire,trauzti/Alamofire,youweit/Alamofire,yimajo/Alamofire,richardPFisk/Alamofire,rjsamson/Alamofire,Farteen/Alamofire,Staance/Alamofire,mbhuta/Alamofire,mbhuta/Alamofire,Paul-van-Klaveren/Alamofire,ernestopino/Alamofire,sarunw/Alamofire,androidrivne/Alamofire,dgdosen/Alamofire,brandenr/Alamofire,john-langley/Alamofire,dawangjiaowolaixunshan/Alamofire,guipanizzon/Alamofire,kiancheong/Alamofire,bscarano/Alamofire,BNakum/Alamofire,PhuocLinh/Alamofire,guipanizzon/Alamofire,yjkim/Alamofire,st3fan/Alamofire,robskillington/Alamofire,zuthan/Alamofire,Lomotif/Alamofire,SampleLiao/Alamofire,Koalappp/Alamofire,foxkillerli/Alamofire,LionHeart123/Alamofire,davepatterson/Alamofire,davepatterson/Alamofire,christophercotton/Alamofire,rafaelvg/Alamofire,BNakum/Alamofire,DouKing/Alamofire,nickygerritsen/Alamofire,alvincrisuy/Alamofire,Noobish1/Alamofire,agustindc-rga/Alamofire,PhilJay/Alamofire,Baza207/Alamofire,Alamofire/Alamofire,RyanCodes/Alamofire,PhilJay/Alamofire,dandalf/Alamofire,hazytint/Alamofire,petereddy/Alamofire,lumenlunae/Alamofire,kiancheong/Alamofire,DreamHill/Alamofire,agustindc-rga/Alamofire,Paul-van-Klaveren/Alamofire,tonyli508/AlamofireDomain,jschmid/Alamofire,gauravds/Alamofire,christophercotton/Alamofire,cesar-oyarzun-m/Alamofire,Karumi/Alamofire-Result,irealme/Alamofire,hazytint/Alamofire,neugartf/Alamofire,libiao88/Alamofire,alex-learn/Alamofire,iosheadhunter/Alamofire,muukii/Alamofire,richardPFisk/Alamofire,jmkr/Alamofire,yujiaao/Alamofire,LionHeart123/Alamofire,Holmusk/Alamofire,DreamHill/Alamofire,tonyli508/AlamofireDomain,cmpt275group9/Alamofire,easyui/Alamofire,zuthan/Alamofire,jschmid/Alamofire,imjerrybao/Alamofire,bnadim/Alamofire,leelili/Alamofire,rafaelvg/Alamofire,kevin-zqw/Alamofire,bnadim/Alamofire,Screon/Alamofire,Farteen/Alamofire,twobitlabs/Alamofire,Alamofire/Alamofire,iosheadhunter/Alamofire,chokett/Alamofire,yaoxiaoyong/Alamofire,meteochu/Alamofire,Vkt0r/Alamofire,twobitlabs/Alamofire,dawangjiaowolaixunshan/Alamofire,nickygerritsen/Alamofire,followwind007/Alamofire,Vkt0r/Alamofire,lclamotte/Alamofire,Holmusk/Alamofire,leelili/Alamofire,thebugcode/Alamofire,mcgrady20150318/Alamofire,Staance/Alamofire,Lomotif/Alamofire,red3/Alamofire,liuchungui/Alamofire,youweit/Alamofire,DouKing/Alamofire,androidrivne/Alamofire,PhuocLinh/Alamofire,revdotcom/Alamofire,yujiaao/Alamofire,irealme/Alamofire,antigp/Alamofire