The 20130423 beta release (Repeater Software)

Hi Folks

This is a small release which contains lots of new work, but for most people
it's a small upgrade. The changes are:

1. Change to the wiringPi library rather than bcm2835 library for controlling
the RPi. This has minimal impact but for those providing executables for the
RPi, they'll have to find the wiringPi library and include that. It can be found
at <https://projects.drogon.net/raspberry-pi/wiringpi>

2. Added the generic D-Star Repeater and configuration program. This is the next
generation of the repeaters where they will all be rolled into one program
(apart from the Analogue Repeater). It isn't ready yet so could package creators
*not* include either the D-Star Repeater or D-Star Repeater Config in your
packages.

3. Allow incoming radio audio during the valid_wait period. This was requested
(spotted?) by Ramesh. In previous versions, in the time between the end of a
local transmission and the ack, no other local transmission will be
retransmitted. This has been changed so that they now are, however the time-out
is not reset until the ack is transmitted.

4. Don't reset the announcement timer on transmissions.

5. Added XRF851.

Jonathan G4KLX