Added fanart.tv API library (See https://github.com/z4r/python-fanart)
Post-Processing now has configurable options for downloading extra
artwork from Fanart.tv.  Added art includes:
	- Show Thumb
	- Show ClearLogo
	- Show ClearArt
	- Show Character Art
	
Additionally, both banners and posters may now be downloaded, instead of
having to choose one or the other.  The use_banner checkbox will still
save a banner to the poster image.