update readme and release note
Merge pull request #5585 from minggo/develop

update readme and release note
Uses 'generate-tempate-files.py' to generate cocos2dx_files.json
Merge pull request #5586 from dumganhar/develop

Uses 'generate-tempate-files.py' to generate cocos2dx_files.json
[AUTO][ci skip]: updating cocos2dx_files.json
Merge pull request #5587 from CocosRobot/update_cocosfiles_1394089188

[AUTO][ci skip]: updating cocos2dx_files.json
Merge branch 'develop' into develop_nutty_modify_framework_for315