Feature/watchlist

Adds Eye icon, new watchlist tab, like I said on discuss, its a different set of TV Shows, since it only gets info from the Trakt API, not from your existing Favourite shows.
Its a bit more stable now, it caches the 'progress' request on the settings db (I don't know if its good practice but its the only place I found to cache it), I also save the last time fetched, so it fetches it only one time per day, no each time you click on the tab.
It adds the tv shows returned from the Trakt progress API to the bookmarks DB so it gets cached, also adds it to favourites .
Adds next_episode property to shows (same info returned from Trakt API) that can be shown on the view template.

I think its ready to merge.