Update MMProgressHUD.podspec
Update MMProgressHUD.podspec

Update podspec to include MMProgressView-Protocol.h in the public header files
mutualmobile/MMProgressHUD,0359xiaodong/MMProgressHUD-Fork,wangmy/MMProgressHUD,smallLabel/MMProgressHUD,smallLabel/MMProgressHUD,smallLabel/MMProgressHUD,mutualmobile/MMProgressHUD,mutualmobile/MMProgressHUD,wangmy/MMProgressHUD,wangmy/MMProgressHUD,0359xiaodong/MMProgressHUD-Fork