Some warning fixes in SocketIO, ContriolButton, js_manual_conversion.h/.cpp.
Diables CC_ENABLE_CACHE_TEXTURE_DATA  in Renderer::initGLView since Renderer is not inherited from Object now. CCNotificationCenter will not be able to work.

Signed-off-by: James Chen <jianhua.chen@cocos2d-x.org>
More warning fixes.
Small fix in CCValue.cpp. visitMap is a template that supports IntValueMap and ValueMap. IntValueMap is confused. ValueMapIntKey seems better.
Merge pull request #4531 from dumganhar/extension-warning-fix

Some warning fixes in SocketIO, ContriolButton, js_manual_conversion.h/.cpp.