Add Trakt.tv Info Caching
More work on caching trakt.tv

This is a pain, no one should have to live through this pain. NO ONE!!!!
Trakt.tv Caching now works

This addresses issue #419 and now caches trakt.tv results. I know a lot of people will be happy now, especially Jimmy from trakt.tv ;)
Merge pull request #506 from popcorn-team/cache-trakt

Cache Trakt.tv Data