Fix loading more posts on UserActivity tab
Add backup restoration feature backend

Teeeeeeeeeeeeeests and basically everything except putting the boxes on the profile page
Add avatar uploading via profile

Things of note:
 * Duplicating the current_user into user, to make changes show up in
   both the header and the page
 * Trying to keep the old avatar path working for now
 * Lazily just tacking on ".json" to the /avatar path for now (until the
   above legacy codepath is removed)
 * Not using the crop modal, because it'll break animated avatars
Hook up backup, password, username changing on new settings page

List of Curiosities:
 * It saves twice — once under the current username, and another under
   the new one.  This is to make Ember Data think it's clean.  Stupid.
 * The computed property for detecting if passwords match twitches
   sometimes.
 * The computed property for canSubmit ignores the current value of
   passwordMismatch.  I have no fucking clue, I triple-checked the
   logic.
Hack together MAL import in settings page

Honestly I don't even know if it works, it should in theory but lord
only knows.
Add Facebook Connect to new settings page
Changed bootrap focus glow to orange border
Fixed settings headline position
Add es5-shim and es5-sham to give at least something to old janky-ass browsers
Added model placeholder for apps page
Added basic template and style
Finished up first design version
Finished design; Hooked up model rendering
Hide cover image for now
Added basic cards for most popular apps