[Tak] Updated the Submit and Reply button on the idea.html webpage
[Tak] Add focus to the comment textarea when Reply button is clicked
[Zhenghan] Comment system finished. Like feature validation. User validation
Merge remote-tracking branch 'origin/master'

Conflicts:
	app/js/controllers.js
	app/partials/idea.html
[Tak] Tiny revisions on controller.js and idea.html
[Tak] Merge idea.html
[Jimmy]Added background image to all pages.
[Jimmy] Merge with former updates and finish styling on each page