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) 

update chinese release note