Almost done with rev 2

I added the PR-8210A interface to the rev 2 design yesterday.

Now we have met almost all of the goals for rev 2.

A big problem we are running into is space on the PCB. The problem is we have so many components now that we are very low on PCB space and it's looking fairly likely that we won't have enough room. In order to increase the amount of space we want to use, we will have to pay $500 for the basic commercial version of Eagle. Anyone want to contribute toward that? :)