Feature #4916: SpiderMonkey v28 prebuilt for android/mac/ios added
Feature #4916: Update SpiderMonkey v28 include headers
Feature #4916: Upgrade manual bindings to v28
Feature #4916: Upgrade auto bindings to v28
Merge commit '17c21ebbe5474bca4d1aeec905d697685ec1cdc0' into SMv28
Merge pull request #301 from pandamicro/master

Issue #4755: Improve PhysicsSprite adding logic
Feature #4916: Upgrade bindings generator to SpiderMonkey v28
Merge pull request #303 from pandamicro/SMv28

Feature #4916: Upgrade SpiderMonkey to v28 for android/mac/ios
Fixed #4927: Support XMLHTTPRequest in JSB for templates