[DARARepeater] Part arrival, and Pi-competition

[Tigerwolf]

The optical encoder for the HP RF generator arrived.  At first glance, it 
looks to be the right part.

Also, on the heels of Pi-3 announcment comes more price and 
performance competition:

<http://www.hardkernel.com/main/main.php>

-- 
=^_^=  Tigerwolf