issue #5797: fix the bug of assigning number to LabelTTF
issue #4544: fix memory leak of XMLHTTPRequest with sendImmediate
issue #4544 : Add abort function to JSB XMLHTTPRequest
issue #4544: fix comments
Refactor #5677 : Upgrade XHRTest to test full feature of XMLHttpRequest
issue #4544: add timeout default value and add some comments
Merge pull request #694 from joshuastray/master

issue #5797: fix the bug of assigning number to LabelTTF