Manual Band Switching implemented

Press FUNCTION key > 2 seconds to change band. (Rebel Led will blink)

How does it function :

1. The rebel will start on 40 meters 7030.

2. Pressing the FUNCTION button for more then 2 seconds will change to band to 20 meters 14060 kHz. The 'Rebel led' will blink 2 times.

3. Pressing the FUNCTION button for more then 2 seconds again will move back to 40 meters 7030 kHz. The 'Rebel led' will blink 4 times.

Using the CAT feature (part of the RebelAllianceMod sketch) will switch the band automatically based on the CAT received frequency. The 'Rebel led' will blink accordingly as with manual switching.