- use inline functions for gpio (typesafe, no speed penalty)
- fix sortSerialPortFunctions (original was IMO broken)
- allow softserial port on sonar pin when FEATURE_SONAR is not enabled
- minor style changes and comments
series development board.
These boards can be picked up for less than $11, coupled with a 10DOF
sensor board they make a great development platform or cheap expandable
FC.
Pretty much all pins are available to be used, unlike on the less
capable and more expensive OLIMEXINO.