Edit categories HTML, add sref links to #/latest/category-slug.
Load categories from database, list most recent topics on category tab

And some refactoring, e.g. rename some variable.
Move CSS from wwwdebikicom theme to client/forum/.
Tweak CSS, add category topic count and dummy description.
Add momentjs dependency via Bower.
Use Moment.js to format dates.
Add forum nav bar link to All Categories

And add comment and tweak CSS.