demo script plus cw spacing fix

demo.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+echo -e "\nDemo of CubeSatSim sends CW telemetry once then AFSK continuously\n\n"
+
+/home/pi/CubeSatSim/radio.cw.once
+
+/home/pi/CubeSatSim/radio.afsk
+
+