Merge pull request #6 from mmccurdy07/master

v3 API
Add logo
- Use https
- Cache json data for a month (data won't change that much and 404s will not be cached)
- Create a 'get_json' method to handle retrieving the json data from within all other methods
- Add country option to be able to find the right content rating
Denmark = 'DK'
Remove languages I added to test.
Include country code in metadata.content_rating path for media flags
Use smaller preview images/thumbs
Add the ability to use TheMovieDB as a primary agent.
Fix formatting of content_rating
Remove title pref; retrieve title and original title from TMDB
Fixes for artwork retrieval, pref and tweaks to prefer localized artwork, provision to limit excessive results.  Improved logging for failed API requests to help diagnose potential performance issues.