Elastic bounceback for ScrollView

Add iOS-like elastic bounceback.
If you scroll content of scroll view out of insets,
its content will be scrolled 0.35 of user scrolled distance.
Merge commit 'refs/pull/5856/head' of git://github.com/cocos2d/cocos2d-x into merge5856
closed #4382: added missed scaleZ feature for scaleZ
closed #4447: [Desktop] Can't receive touchEnded event when mouse up outside of window
closed #4448: Elastic bounce back effect support for cocos2d::extension::ScrollView.
issue #4448: Respond to move event  if dragging is enabled, no matter whether mouse is in the content of cocos2d::extension::ScrollView.
Merge pull request #5869 from dumganhar/iss4448-scrollview

closed #4448: Elastic bounce back effect support for cocos2d::extension::ScrollView.
Merge pull request #5868 from dumganhar/iss4447

closed #4447: [Desktop] Can't receive touchEnded event when mouse up outside of window
Update CHANGELOG [ci skip]
closed #4450: FileUtils::addSearchResolutionsOrder doesn't check whether there is a 'slash' at the end of path.
Merge pull request #5871 from dumganhar/iss4450-missing-slash

closed #4450: FileUtils::addSearchResolutionsOrder doesn't check whether there is a 'slash' at the end of path.
Update CHANGELOG [ci skip]
Merge pull request #5870 from dabingnn/fix_scale0Bug

closed #4382: added missed scaleZ feature in ScaleTo and ScaleBy.
Update CHANGELOG [ci skip]
[AUTO]: updating luabinding automatically
Merge pull request #5873 from CocosRobot/update_lua_bindings_1395225104

[AUTO]: updating luabinding automatically