Add support for iOS 6.1+ for podspec
Add support for iOS 6.1+ for podspec
liuzechen/RBBAnimation,liuzechen/RBBAnimation,robb/RBBAnimation,Farteen/RBBAnimation,wearezeta/RBBAnimation,mitchellporter/RBBAnimation,mitchellporter/RBBAnimation,Farteen/RBBAnimation,adronfan/RBBAnimation,Farteen/RBBAnimation,adronfan/RBBAnimation