issue #3037:Add assetsmananger lua binding and a releated test sample
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developAssetsManager
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developAssetsManager
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developAssetsManager
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developAssetsManager

Conflicts:
	build/cocos2d_libs.xcodeproj/project.pbxproj
issue #3037:Add assetsmananger lua binding and a releated test sample
issue #3037:Modify platform build config
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into developAssetsManager

Conflicts:
	build/cocos2d_samples.xcodeproj/project.pbxproj
	cocos/scripting/lua/bindings/LuaScriptHandlerMgr.h
	cocos/scripting/lua/script/Cocos2dConstants.lua
issue #3037:Modify AssetsManagerTest.lua
Merge pull request #4058 from samuele3hu/developAssetsManager

issue #3037:Add assetsmananger lua binding and a releated test sample