Sleep timer for Live TV

[GoogleCodeExporter]

I have recently switched to XBMC and Mythbox from MythFrontend, and I have to 
say it is great. The stability on OSX, especially for live tv is like chalk and 
cheese.

The only feature that I am missing is a sleep timer on live tv to exit out of 
the currently playing stream. This will put XMBC in a state where the OS power 
saving functions can dim the screen and eventually put the computer into a 
sleep state.

I mainly use OSX (iMac 27" running 10.6) and an Apple Remote. Ideally it would 
be available from the "Now Playing" long play button keypress action.

I apologise if this feature exists and the problem is with me not finding it.

Original issue reported on code.google.com by alexcfer...@gmail.com on 31 Mar 2012 at 12:49