changed the fail_safe.ino to include a hard reset pin that will be toggled HIGH to indicate that a hard reset has been requested. AVC_2014.ino and AVC_2014.h will next be updated to have an interrupt that will toggle RESET when the pin goes HIGH.

the radio should now have 4 positions for channel 3:

MANUAL -> ch3 < 1250
AUTOMATIC -> 1250 < ch3 <= 1500
AUX -> 1500 < ch3 <= 1750
WP_SET -> ch3 > 1750

Signed-off-by: rkburnside <richard@burnsides.org>