Got the IR software to work, finally

The IR remote code I got from the Arduino forums worked great as a standalone application, but not too well with other applications sharing the main loop. After some modifications, I finally got it to work. I posted it in its original thread (see the post below). Now I am ready to integrate it with the rest of my code. Plan to implement the following remote functions:

1. 1X volume control
2. 10X volume control (the remote has lots of keys)
3. "dim"/"undim" (mute)
4. Direct filter selection (select 1, 2, 3, 4, 5)