fix flicker of fast tilemap (cocos2d#20387)

setPercent after initialization (cocos2d#19718)

update versoin code (cocos2d#19265)

sync Chinese release notes with English improvements (cocos2d#18832)

* sync chinese release notes with English improvements

* little fix

* update doctoc

* update releaseNotes doctoc

fix misspelling on RELEASE_NOTES.md (cocos2d#18338)

update release date (cocos2d#17870)

JSB SocketIO.connect supports to pass a CA cert file (cocos2d#17736)

* JSB SocketIO.connect supports to pass a CA cert file

* The second parameter of SocketIO.connect function is probably a `option` object. JSB just ignores it.

[ci skip]Changelog releasenote (cocos2d#17695)

* update release note

* update toc

* update changelog

update version (cocos2d#17230)

update version and release note (cocos2d#17170)