Version 0.3.2 update

The X-Plane 9 program now has all the features except for the LCD
output. It uses around 17kB code, and 800 B RAM.

Added the PCB layout for the Teensy++ shield that goes on the back of
the keypad.
0.3.3

Modified the Com1 and Com2 Selector button commands, as they did not
work under X-Plane 9.70