fix a bug of CCUserDefault
issue 1489:add AssetsManager
Merge https://github.com/cocos2d/cocos2d-x into iss1489-AssetsManager
issue #1489:modify sample code and add readme
Update samples/Cpp/AssetsManagerTest/README.md
Merge https://github.com/cocos2d/cocos2d-x into iss1489-AssetsManager
Merge branch 'iss1489-AssetsManager' of https://github.com/minggo/cocos2d-x into iss1489-AssetsManager
issue #1489: update ios libcurl and add android project
issue #1489:rename AssetsManagerProtocol to AssetsManagerDelegate
issue #1489:android works ok
Merge pull request #9 from minggo/iss1489-AssetsManager

issue #1489: Updates with upstream.