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.
Merge pull request #3932 from dumganhar/develop

Removing unused ios projects.
issue #2905: adjust folder structure
Merge pull request #3933 from minggo/iss2905-adjust_folder

adjust folder structure
issue #2905: remove redundant codes
Merge pull request #3934 from minggo/iss2905-adjust_folder

remove redundant codes