bg: update for yify api v2.
bg: update for yify api v2.

* change yts.re -> yts.to
* change apiURL to new apiURL
* pass resp.data instead of resp for making stuff 'easier' (for me)
* instead of data.status (which by default returns 'ok'), read 'movie_count'
  to check if the movie exists
* misc updates for new json structure

Signed-off-by: Vineeth Raj <4993fe59649100b917e360daebe1fe6597125a6c@openmailbox.org>

emincansumer/yify-imdb-chrome-extension,thewisenerd/yify-imdb-chrome-extension,emincansumer/yify-imdb-chrome-extension,thewisenerd/yify-imdb-chrome-extension