[DEV-1396] Remove skin setting from livesettings (it will be hardcoded).
[DEV-1396] Copy (grrrrr) assets from Rover to Askbot.
[DEV-1396] Include Rover new_styles styles. Add the Rover header to all Askbot pages. First attempt.
[DEV-1396] Rename rover_skin to rover_skin-en (Askbot seems to expect it).
[DEV-1396] Set default skin to rover_skin-en. Change search_header to header in base.html.