[mythtv] multiple favorite channel groups, Ticket #199

[Bill Stewart]

Thank you so much for getting my patch for the multiple favorite channels 
groups into SVN.  I am glad that I updated it recently to SVN.

A thank you to Matthew Wire for updating my patch on several occasions to 
SVN.

Paulh: Do you think could take a look at #3493 and #3829?  These are rather 
small patches and allow the video coverart to be shown in the OSD.  It would 
be a nice complement to all the fine work that Robert has submitted recently 
for mythvideo.