closed #3991, Add method to reload cached texture & update the nodes used the texture.
fixed #3868. Add guard check to send method of HttpClient
modify autotest.py
Merge branch 'develop' into issue3991
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into issue3991
closed #3991, Remove the method CCTextureCache::updateTexture().
fixes in the release notes
Release Notes improvements
Merge pull request #5592 from shujunqiao/develop

modify autotest.py
[Jenkins] fix android build
Merge pull request #5608 from lmskater/fix-android-build

[Jenkins] fix android build
[Jenkins] add linux build
Merge pull request #5609 from lmskater/add-linux-build

[Jenkins] add linux build
Merge pull request #5525 from andyque/bug3868

fixed #3868. Add guard check to send method of HttpClient
fixed #4300:fixed Label:draw location and BBOX is incorrect.
Improved release notes
Merge pull request #5603 from ricardoquesada/release_notes_fixes

Release notes fixes
new TOC for changelog
Merge pull request #5613 from ricardoquesada/changelog_toc

new TOC for changelog
minor fixes in RELEASE_NOTES

minor fixes in RELEASE_NOTES