Merge pull request #35 from pandamicro/AssetManager

Refactored AssetsManager
Merge pull request #36 from pandamicro/AssetManager

Feature #4977: Refactor AssetsManager API
Merge pull request #37 from pandamicro/AssetManager

Feature #4977: Add new classes to android mk
Merge branch 'v3' of git://github.com/cocos2d/cocos2d-x into lua-vm
Merge branch 'lua-vm' of https://github.com/dumganhar/cocos2d-x into AssetManager