export some function to lua, fix CCArmature bugs

* export `CCFileUtils::getFileData` to lua
* fix CCArmature bug from https://github.com/cocos2d/cocos2d-x/commit/af754bfe5d1b28b072ec14ed5ffc1900f06a7e95
* export `CCArmature::connectMovementEventSignal` to lua, it can receive a action status form `CCArmatureAnimation::MovementEventSignal` , see: <http://zengrong.net/post/1949.htm>