Kidronekit

Initial
* Initial kidronekit from [Dronekit](https://github.com/dronekit/dronekit-python.git)

Cleanup
* Removed some legacy and keep the core of the source code

Improvements
* Support full data of `VFR_HUD` message from `Mavlink`: `airspeed`, `groundspeed`, `heading`, `throttle`, `alt`, `climb`