add WebP support
fix some issues
fix for mac
fix for win32
update libwebp to 2.1
add support RGB888, RGB565,RGBA4444
fix some issues
remove RGB565 support
Initial Import of tinyxml2 to replace libxml2
added ccuserdefault tinyxml2 ver
final fix.. tested
Merge branch 'upstream_master' into add_webp_support
merge upstream
fix for android
remove duplicate codes
Merge branch 'tinyxml2' of https://github.com/martell/cocos2d-x into tinyxml
Merge branch 'add_webp_support' of https://github.com/dualface/cocos2d-x into iss1770-webp

Conflicts:
	scripting/javascript/bindings/generated
issue #1770: Adding test_image.webp.
issue #1770: Updating iOS project configuration and adding WEBP test demo.
issue #1770: Webp works ok on Android and iOS.
issue #1703:move tinyxml2 to cocos2dx/support