Fix html editor buttons
Add superscript and subscript
Enable iframes for youtube embed
Add basic insert youtube video function
Improve youtube video uploader
Allow youtube video to display on forum posts
fixed achievement-icon being too big - fixes #232
fixed spacing for each name tag (ocd-triggered)
Add a checkbox to let the answers be sorted in survey summary
Add a function to change or add the params by jQuery
call the change function and refresh page when click checkbox
Sort or un sort answers by params in controller
fix progress bar display bug when answers are unsorted
refine code, add spaces before function params
remove debugger code in controller
s/answer/content
let set_hint return the test cases passed status
Workaround Safari XSS measures
Merge pull request #238 from weiqingtoh/bug/achivement-alignment

Fixed styling issues in statistics tab - Image size & name tags
Merge pull request #240 from jsyeo/jsyeo-fix-stats

s/answer/content