Gamma Dog Update: "Gamma Dog Mini" and firmware update v5.9

Finally found some time to work again on the Gamma Dog project. I had 3 GD electronics modules from the Gen 3 run and a bunch of 38B57 detectors laying around so I decided to turn them into actual units and add some improvements to the firmware. New Firmware release - Current version is 5.9. These are just some of the improvements: - completely new sound library with harmonic suppression and…