[mythtv] [patch] add mediamonitor to context and use in mythvideo

[J. Donavan Stanley]

Leo Weppelman wrote:

>Attached are 2 patches derived from patches previously posted by
>Xavier Hervy. The first patch adds SetMediaMonitor/GetMedias
>functions to the context and the second patch uses this to add
>files from removable devices to the videotree.
>
>Leo.
>  
>

Leo,

Thanks for breaking this stuff out. 

Isaac,

Care to comment on the placement of the libmyth portion of this?  I know 
you've had reservations in the past about things going into MythContext...