Merge pull request #13 from cocos2d/master

Updated with upstream.
Merge pull request #14 from cocos2d/master

Synchronizing to the latest cocos2d-js-test
Merge pull request #15 from cocos2d/master

Updated with upstream.
Merge pull request #16 from cocos2d/master

Updated with upstream.
Merge pull request #20 from cocos2d/master

Updated with upstream.
Added Test for XMLHttpRequest
Merge branch 'master' of https://github.com/zynga/cocos2d-js-tests

# By dingpinglv (9) and others
# Via SeanLin (8) and others
* 'master' of https://github.com/zynga/cocos2d-js-tests:
  fixed #2144 add a ParticleBatchNode testcase to tests
  fixed #2144 add a ParticleBatchNode testcase to tests
  Adding automation to Layer Tests
  Making most/all Label tests pass on html5
  Changing containsPixel to check for approximate color match
  Fixed issues with CocosDragon and CrystalCraze, tested with CocosPlayer and in HTML5/browsers
  Adds automation to clipping node
  Fixing bugs in LabelTest automation
  Adding automation tests for Labels
  fixed #2082 remove ActionOrbit from arrayOfActionsTest when renderer is Canvas
  fixed #2082 Add a file to build.xml
  fixed #2082 remove ActionOrbit from arrayOfActionsTest when renderer is Canvas
  fixed #2082 Add a file to build.xml
  fixed #2082 correct a mistake of preload resource list for JSB
  fixed #2082 preload some resource for PerformanceSpriteTest
  fixed #2082 add two tests to ParticleTest, corrected some mistakes of ClippingNodeTest
  Advanced test works on cocos2d-iphone JSB
  add cc.LoaderScene Class
  Fix of CocosNodeTest.js and EffectAdvancedTest.js for JSB.
  add cc.LoaderScene Class