Sickbeard image passthrough

The sickbeard api can return banners and posters for tvshows. The
content type must be set to 'image' and json_out() must not be used.

The fetch() method has been altered to bypass loads() on images,
because these are not in Json format.
Twitter Bootstrap update (2.3.0)
Sickbeard Show details page

New page for show details, including, banner, seasons/episodes.