Adds Multi bitrate / quality / url support

Adds support for showing the content at a quality / bitrate level that
works for the internet connection. It seems that the source provides HD
content at 189k, 436k, and 1456k.
Adds Artwork for ChannelStore
Adds Resume Features For Playback

Adds the resume feature to allow the playback from the position the
video was previously stopped at. Works great. :)