Python bindings for C++ MAVLink processing

[SamuelDudley]

Use pybind11 to make a JSON MAVLink bridge in C++ with python interfaces. Device handling and parsing will be in C++ and it will create JSON formatted strings to be passed via websocket. All message processing and sorting will happen client side in JavaScript.

[SamuelDudley]

Need to link to MAVLink as a sub module and build the bindings using Cmake.

Parsing in C++ will remove a lot more of the processing (CPU) overhead.

[SamuelDudley]

Processing messages via pymavlink will remain at launch one of the two options will be used