Make Java 7 build requirement more clear.
Make Java 7 build requirement more clear.

b-cuts/okhttp,germanattanasio/okhttp,yakatak/okhttp,PatrickDattilio/okhttp,linyh1993/okhttp,junenn/okhttp,layerhq/okhttp,KENJU/okhttp,wanjingyan001/okhttp,jfcalcerrada/okhttp,SunnyDayDev/okhttp,yangzilong1986/okhttp,Cryhelyxx/okhttp,ChanJLee/okhttp,nachocove/okhttp,zmarkan/okhttp,jinmiao0601/okhttp,teffy/okhttp,yschimke/okhttp,NerrickT/okhttp,ptornhult/okhttp,Pannarrow/okhttp,JohnTsaiAndroid/okhttp,junenn/okhttp,wendelas/okhttp,tiarebalbi/okhttp,wfs3006/okhttp,lockerfish/okhttp,raumfeld/okhttp,ansman/okhttp,YlJava110/okhttp,joansmith/okhttp,hisery/okhttp,liqk2014/okhttp,snodnipper/okhttp,SunnyDayDev/okhttp,ankit3005/okhttp,wlrhnh-David/okhttp,cmzy/okhttp,mgp/okhttp,ooon/okhttp,Nextpeer/okhttp,PatrickDattilio/okhttp,CharlieJiang/okhttp,yukuoyuan/okhttp,huihui4045/okhttp,chaitanyajun12/okhttp,MichaelEvans/okhttp,wutianlong/okhttp,ChinaKim/okhttp,YlJava110/okhttp,SashiAsakura/okhttp,hanlonghxp/okhttp,43350860/spdylearn,yanqiangfire/okhttp,elijah513/okhttp,hesy007/okhttp,xph906/NewOKHttp,ZhQYuan/okhttp,LB6264/okhttp,YlJava110/okhttp,fjg1989/okhttp,xubuhang/okhttp,linyh1993/okhttp,DeathPluto/okhttp,lobo12/okhttp,minakov/okhttp,Synix/okhttp,huluhaziqi/okhttp,mikandi/okhttp,Nextpeer/okhttp,jovezhougang/okhttp,VideoTec/okhttp,hgl888/okhttp,ChanJLee/okhttp,yukuoyuan/okhttp,zhupengGitHub/okhttp,shashankvaibhav/okhttp,VikingDen/okhttp,mikandi/okhttp,chaitanyajun12/okhttp,lobo12/okhttp,CyanogenMod/android_external_square_okhttp,Gaantz/okhttp,adithyaphilip/okhttp,fjg1989/okhttp,Synix/okhttp,shashankvaibhav/okhttp,zmarkan/okhttp,hisery/okhttp,sam-yr/okhttp,ijidan/okhttp,teffy/okhttp,xuIcream/okhttp,Eagles2F/okhttp,ijidan/okhttp,elijah513/okhttp,airbnb/okhttp,germanattanasio/okhttp,adithyaphilip/okhttp,yswheye/okhttp,v7lin/okhttp,ruikong/okhttp,StarRain/okhttp,yangshangwei/okhttp,292388900/okhttp,mikandi/okhttp,yschimke/okhttp,292388900/okhttp,43350860/spdylearn,mgp/okhttp,xubuhang/okhttp,NightlyNexus/okhttp,airbnb/okhttp,yuhuayi/okhttp,SashiAsakura/okhttp,sam-yr/okhttp,zmarkan/okhttp,wfs3006/okhttp,Synix/okhttp,ijidan/okhttp,amikey/okhttp,yanqiangfire/okhttp,ZhQYuan/okhttp,b-cuts/okhttp,jpxiong/okhttp,allen0125/okhttp,fjg1989/okhttp,wendelas/okhttp,LittleApple2015/okhttp,qinxiandiqi/okhttp,CyanogenMod/android_external_square_okhttp,xph906/NetProphet,square/okhttp,nachocove/okhttp,zhupengGitHub/okhttp,ansman/okhttp,jituo666/okhttp,liqk2014/okhttp,java02014/okhttp,MichaelEvans/okhttp,wlrhnh-David/okhttp,allen0125/okhttp,zmywly8866/okhttp,iooly/okhttp,v7lin/okhttp,danielgomezrico/okhttp,jinmiao0601/okhttp,idelpivnitskiy/okhttp,yuhuayi/okhttp,jokerzzzz/okhttp,layerhq/okhttp,Voxer/okhttp,sunshinecoast/okhttp,ysjian/okhttp,ChinaKim/okhttp,codelion/okhttp,java02014/okhttp,minakov/okhttp,ruhaly/okhttp,SashiAsakura/okhttp,joansmith/okhttp,lockerfish/okhttp,JohnTsaiAndroid/okhttp,hgl888/okhttp,Pannarrow/okhttp,artem-zinnatullin/okhttp,LB6264/okhttp,liqk2014/okhttp,huihui4045/okhttp,MichaelEvans/okhttp,ooon/okhttp,jiyiren/okhttp,wanjingyan001/okhttp,apoorvmahajan/okhttp,jrodbx/okhttp,germanattanasio/okhttp,hesy007/okhttp,yangshangwei/okhttp,juoni/okhttp,joansmith/okhttp,AmberWhiteSky/okhttp,felipecsl/okhttp,adithyaphilip/okhttp,juoni/okhttp,lypdemo/okhttp,danielgomezrico/okhttp,damien5314/okhttp,chaitanyajun12/okhttp,iooly/okhttp,xubuhang/okhttp,tsdl2013/okhttp,VikingDen/okhttp,huluhaziqi/okhttp,amikey/okhttp,rschilling/okhttp,nachocove/okhttp,ansman/okhttp,v7lin/okhttp,zace-yuan/okhttp,jpxiong/okhttp,Cryhelyxx/okhttp,309746069/okhttp,jfcalcerrada/okhttp,VioletLife/okhttp,hgl888/okhttp,iooly/okhttp,lypdemo/okhttp,ChinaKim/okhttp,HuangWenhuan0/okhttp,jrodbx/okhttp,jituo666/okhttp,felipecsl/okhttp,qingsong-xu/okhttp,Jinghualun/okhttp,marcelobns/okhttp,mjbenedict/okhttp,xph906/NetProphet,ptornhult/okhttp,enlyn/okhttp,minakov/okhttp,VideoTec/okhttp,shashankvaibhav/okhttp,jokerzzzz/okhttp,lypdemo/okhttp,square/okhttp,ankit3005/okhttp,Papuh/okhttp,marcelobns/okhttp,danielgomezrico/okhttp,Gaantz/okhttp,PatrickDattilio/okhttp,wutianlong/okhttp,tsdl2013/okhttp,VideoTec/okhttp,cketti/okhttp,damien5314/okhttp,sunshinecoast/okhttp,zace-yuan/okhttp,AmberWhiteSky/okhttp,jiyiren/okhttp,Voxer/okhttp,NightlyNexus/okhttp,NerrickT/okhttp,LittleApple2015/okhttp,mjbenedict/okhttp,wfxiang08/okhttp,qinxiandiqi/okhttp,jinmiao/okhttp,cnoldtree/okhttp,cnoldtree/okhttp,marenzo/okhttp,allen0125/okhttp,tiarebalbi/okhttp,tsdl2013/okhttp,lobo12/okhttp,DeathPluto/okhttp,damien5314/okhttp,VioletLife/okhttp,rschilling/okhttp,ruhaly/okhttp,apoorvmahajan/okhttp,Eagles2F/okhttp,wfs3006/okhttp,yangshangwei/okhttp,sunshinecoast/okhttp,ruhaly/okhttp,marcelobns/okhttp,DeathPluto/okhttp,jovezhougang/okhttp,xph906/NewOKHttp,wendelas/okhttp,tiarebalbi/okhttp,HuangWenhuan0/okhttp,Gaantz/okhttp,zheng1733/okhttp,artem-zinnatullin/okhttp,jokerzzzz/okhttp,lockerfish/okhttp,huihui4045/okhttp,wlrhnh-David/okhttp,bestwpw/okhttp,mgp/okhttp,ze-pequeno/okhttp,zmywly8866/okhttp,nfuller/okhttp,HuangWenhuan0/okhttp,yangzilong1986/okhttp,linyh1993/okhttp,jiekekeji/okhttp,VioletLife/okhttp,jfcalcerrada/okhttp,jituo666/okhttp,StarRain/okhttp,ptornhult/okhttp,KENJU/okhttp,enlyn/okhttp,CyanogenMod/android_external_square_okhttp,ruikong/okhttp,wfxiang08/okhttp,Jinghualun/okhttp,yukuoyuan/okhttp,xuIcream/okhttp,square/okhttp,b-cuts/okhttp,jrodbx/okhttp,Voxer/okhttp,qingsong-xu/okhttp,jpxiong/okhttp,jinmiao/okhttp,CharlieJiang/okhttp,zace-yuan/okhttp,apoorvmahajan/okhttp,ze-pequeno/okhttp,Cryhelyxx/okhttp,Papuh/okhttp,SOFTPOWER1991/okhttp,hanlonghxp/okhttp,icefoggy/okhttp,yuhuayi/okhttp,Papuh/okhttp,qinxiandiqi/okhttp,snodnipper/okhttp,java02014/okhttp,idelpivnitskiy/okhttp,apoorvmahajan/okhttp,wanjingyan001/okhttp,Nextpeer/okhttp,SOFTPOWER1991/okhttp,hanlonghxp/okhttp,cmzy/okhttp,309746069/okhttp,jinmiao/okhttp,bestwpw/okhttp,amikey/okhttp,ooon/okhttp,yakatak/okhttp,cnoldtree/okhttp,LB6264/okhttp,mjbenedict/okhttp,jiekekeji/okhttp,airbnb/okhttp,AmberWhiteSky/okhttp,SOFTPOWER1991/okhttp,yswheye/okhttp,zheng1733/okhttp,wfxiang08/okhttp,zhupengGitHub/okhttp,nfuller/okhttp,ankit3005/okhttp,bestwpw/okhttp,yschimke/okhttp,ze-pequeno/okhttp,ysjian/okhttp,xph906/NewOKHttp,Pannarrow/okhttp,JohnTsaiAndroid/okhttp,icefoggy/okhttp,jinmiao0601/okhttp,huluhaziqi/okhttp,sam-yr/okhttp,cketti/okhttp,StarRain/okhttp,snodnipper/okhttp,ysjian/okhttp,jiyiren/okhttp,icefoggy/okhttp,junenn/okhttp,hesy007/okhttp,Jinghualun/okhttp,CharlieJiang/okhttp,enlyn/okhttp,yswheye/okhttp,Eagles2F/okhttp,marenzo/okhttp,yangzilong1986/okhttp,309746069/okhttp,xuIcream/okhttp,raumfeld/okhttp,yanqiangfire/okhttp,nfuller/okhttp,VikingDen/okhttp,codelion/okhttp,marenzo/okhttp,xph906/NetProphet,NerrickT/okhttp,artem-zinnatullin/okhttp,ruikong/okhttp,cketti/okhttp,teffy/okhttp,zmywly8866/okhttp,yakatak/okhttp,layerhq/okhttp,jovezhougang/okhttp,rschilling/okhttp,NightlyNexus/okhttp,idelpivnitskiy/okhttp,codelion/okhttp,ZhQYuan/okhttp,292388900/okhttp,zheng1733/okhttp,elijah513/okhttp,felipecsl/okhttp,LittleApple2015/okhttp,qingsong-xu/okhttp,ChanJLee/okhttp,jiekekeji/okhttp,SunnyDayDev/okhttp,KENJU/okhttp,hisery/okhttp