Add follow up image updates

These are additional follow ups from #38 for @MichaelTunnell and @keobrien08.

Question: Could we do better than [fanart.jpg](http://raw.githubusercontent.com/RobLoach/plugin.video.jupiterbroadcasting/bdad04369d84e221f5b1acadc724c74a241aa853/fanart.jpg)? To build that, I just expanded the existing one to the 1920x1080 size of [XBMC's FanArt](http://wiki.xbmc.org/?title=FanArt) standards, and centered the image. Could we do better than that though? Looks pretty good to me, but I'm no designer :wink: .