More work on user system

Boot: Reinstated user_edit, organised entries.
AngularActionView: Reverted to sending action in partial update, needs
more work to make header version work, since the required positioning
of the comet snippet breaks data link/source views - will need to fix
both at once.
Added user editing and email display snippets/controllers/pages.
Added ng-cloak to user_signup so that success message doesn't flash up
while page is loading.