Expand IMDB automation provider to include charts

Expand IMDB automation provider to include certain top charts, this
includes the 'in theaters' list, as well as the top 250 list. They both
respect the minimum requirement settings.
Merge branch 'develop_automationIMDB' of git://github.com/dkboy/CouchPotatoServer into dkboy-develop_automationIMDB
Cleanup IMDB provider
Watch shutdown when adding automation movies
Return unique imdb list