EMS pinout updates

Closes #39.  Enabled landing gear warning ability, enabled dual battery
temperature detection.

S10-P01: Added EMS pin 10 to gear handle to enable position sensing

EMS Pinouts:
-Changed pin 27, 28, and 36, 37 to Batt 1 and Batt 2 temperature
-Changed pin 10 to landing gear position, per install manual 7-55