label fix
Merge pull request #343 from gena-m/master

fixed CCTextureCache.AddImageAsync
Fix for concurrent modification error that may occur in CCScheduler in a multithreaded game.
some defensive coding to support multi threaded texture loading.
build error fix for the tests.
Merge pull request #344 from oxosi/test

build error fix for the tests.
use Array.Sort for sorting children
Merge branch 'master' of https://github.com/Cocos2DXNA/cocos2d-xna