Merge pull request #2584 from smshuja/master

fixed #2179: pointQueryFirst returns invalid Shape when a shape is not found.
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Merge pull request #2578 from ricardoquesada/grid_projection_fix

Grid setProjection2D fix
Merge branch 'XMLHttpRequest_cchttpclient' of https://github.com/zynga/cocos2d-x into zynga-XMLHttpRequest_cchttpclient
Merge pull request #2574 from minggo/AssetsManager-asynchronization

Fix compiling error of AssetsManager project on windows
issue #2092: Removing unused code in XMLHttpHelper.h
Updating the submodule of JS-Test.
fixed #2092: GC issues fix in XMLHttpRequest.
fixed #2092: #define httpresponse_selector(_SELECTOR) (SEL_HttpResponse)(&_SELECTOR) --> #define httpresponse_selector(_SELECTOR) (cocos2d::extension::SEL_HttpResponse)(&_SELECTOR).
fixed #2092: Updating iOS project configuration.
fixed #2092: Make some function static.
PivotJoint will now take 3 or 4 arguments like in html5
Merge branch 'master' of https://github.com/cocos2d/cocos2d-x into issue2092-XMLHttpRequest
Updating iOS template.
Merge branch 'issue2092-XMLHttpRequest' of https://github.com/dumganhar/cocos2d-x into issue2092-XMLHttpRequest
issue #2092: Updating win32 project configuration.
issue #2092: Bug fix in MinXMLHTTPRequest::send
fixed #2092: Adding macro to make sure header file to be included only once.
Merge pull request #2589 from dumganhar/issue2092-XMLHttpRequest

Merge PR #2561: Adding XMLHttpRequest for JSB.
Update AUTHORS [ci skip]