= cppm support
- currently using open9x order: RETA1a2 (1=aux1 (gain), a=AILR, 2=aux2 (new))
- throttle passthrough to ESC, since most RX cannot enable CPPM and still keep a PWM signal to the ESC at the same time.
- todo: decide if cppm is enabled during run time or compile time

= cmake to test build with various flags (MOD_PCINT0, USE_SERIAL, etc)
= add hex files (with the proper data format this time)
= add hex files (with the proper date format this time)
Merge branch 'cppm' of https://github.com/noobee/FlightStab into cppm
= cmake to use link_directories() to point to user installed libraries. so, now it is possible to build with USE_I2CDEVLIB defined.

= cleanup a couple of #defines and emits
= renamed 20130302_* to 20130203_* to follow YYYYMMDD format.