PX4 makefile: 'make configure_px4fmu' on px4 source before build

Pull Request #37
Ammended: squashed fixups down into a single commit

Signed-off-by: Pat Hickey <pat@moreproductive.org>
AP_Mission: Command and waypoint handling library.

- Reads and writes MAVLINK commands to/from storage.
- Contains a waypoint queue of previous, current, and after waypoints.
- Provides commands associated with current mission leg.
- Allows incrementing waypoints and changing to specific waypoints at anytime.
- Handles DO_JUMP commands while maintaining a valid waypoint queue.
- Performs error checking on waypoint values.
AP_Mission: Removed cliSerial and uncrustified files