Updated title and username output

Updated all titles from boards/threads/cats and usernames to use
ng-bind-html. Although this will already protect against bad input, it
should be scrubs from the db anyway. Things like html or css files that
could be used to troll the site will still get through.
Added ngAnimation

Added the ngAnimation module to add a fast fade-in animation to most
page changes.
Removed moderators

Removed all html that had any mention of moderators from the code.