Make the plugin be compatible with both cocos2d-x-2.2 & cocos2d-x-3.0.
Merge pull request #3926 from minggo/iss2905-adjust_folder

adjust folder structure
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-x into develop
Merge pull request #3925 from natural-law/develop

Update the status of submodule plugin
Merge pull request #3928 from minggo/iss2905-adjust_folder

adjust folder
Merge pull request #3930 from minggo/iss2905-adjust_folder

adjust folder
Merge pull request #3931 from dumganhar/develop

Don't ignore (D|d)ebugXXX folders or files. And move scripting/javascript/bindings/js to 'scripting/javascript/script/' folder.
Don't ignore (D|d)ebugXXX folders or files. And move scripting/javascript/bindings/js to 'scripting/javascript/script/' folder.
Removing unused ios projects.
Merge pull request #3932 from dumganhar/develop

Removing unused ios projects.
Merge pull request #3933 from minggo/iss2905-adjust_folder

adjust folder structure
Merge pull request #3934 from minggo/iss2905-adjust_folder

remove redundant codes
issue #2905: remove sub folders except platform
Merge pull request #3935 from minggo/remove-subfolder

issue #2905: remove sub folders except platform
issue #2905: helloworld build ok on android