issue #2345: class Image add tga image format support.
issue #2345: new/delete -> malloc/free
issue #2345: namespace cocos2d { -> NS_CC_BEGIN
issue #2345: delete unnecessary include
Merge pull request #4408 from boyu0/iss2345_add_tga_support_to_CCImage

[ci skip]issue #2345: add tga support to Image