[mythtv] detiecting upcoming recordings in frontend/mythweb

[Chris Petersen]

> The downside of this is that it is slow.

I think I'll just wait until I have time to grab the recording info from
mythbackend.  It should merge pretty easily with the Program object and
the current data, and shouldn't really have any noticeable performance
problems.  This way, it'll also reflect the data that mythbackend sees,
in case someone decides to change how the backend decides what
should/n't be recorded.

-Chris