Todo

Critical UI elements:
- [x] Badges
- [x] Base styles for buttons, form controls, tables, etc.
- [x] Category box
- [x] Category list
- [x] Date picker and tags
- [x] Dialog popup (e.g. generic popup windows such as share a post, etc.)
- [x] Dialog popup (user profile popup)
- [x] Dropdown / popup
- [x] Header
- [x] Main navigation (i.e. `.list-controls`)
- [x] Material icons
- [x] Modal (e.g. edit category, invite people to a post, etc.)
- [x] Post related elements
- [x] Reply box
- [x] Styles for plugins such as auto complete and Select2
- [x] Timeline
- [x] Topic list
- [x] User profile page layout

Nice to have:
- [ ] Material animation / transition
- [x] Tidy up different views in user profile page
- [x] Update all buttons accordingly (fab/flat/raised)
- [x] Update all form controls accordingly

X (bonus):
- [ ] Convert all Font Awesome icons to Material Design icons
- [x] Scss lint
- [x] Tidy up admin page interface (currently only fixing issues that might cause all or part of the admin page nonfunctional)