Set do_image_upload's desc default value to None
Add render_imgtl_template method
Remove unneeded timeoutobj
Provide tooltip and copytext class in common.js
Update freewall.js
Refactor whole things

* Use scss instead of css
* Brand new index page and login page
* Clarify some method and elements names
* Refactor some codes
Use circle shape on user profile image
Clarify codes.