Adding gitignore.
Adding gitignore.

adonoho/PKRevealController,SanChain/PKRevealController,SummerHF/PKRevealController,xiaotaijun/PKRevealController,wubangjunjava/PKRevealController,adonoho/PKRevealController,libiao88/PKRevealController,RyanTech/PKRevealController,wayne798/PKRevealController,pengleelove/PKRevealController,hanangellove/PKRevealController,nitxc/PKRevealController,policp/PKRevealController,duanhjlt/PKRevealController,AlanJN/PKRevealController,pkluz/PKRevealController,AbooJan/PKRevealController,andyFang1688/PKRevealController,emodeqidao/PKRevealController,adonoho/PKRevealController,wjszf/PKRevealController,leasual/PKRevealController,chieryw/PKRevealController,ramoslin02/PKRevealController,wpostma/PKRevealControllerWP,cnbin/PKRevealController,SuPair/PKRevealController,xingyuniu/PKRevealController,chengkaizone/PKRevealController,BlessNeo/PKRevealController