Beamngpy

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- Add basic Lidar point cloud visualiser
- Add AI control to vehicles
- Add option to attach cameras to scenarios to render frames relative to
world space

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- Restructure code to offer modular sensor model
- Implement scenario class to specify and generate BeamNG scenarios
- Implement vehicle class that offers control over vehicles and ways to
dynamically de-/attach sensors
- Implement shared memory communication to boost performance
- Add Camera sensor with colour, depth, and annotation data
- Add multi-cam support
- Add lidar sensor
- Add G-Force sensor
- Add damage sensor
- Add electrics sensor
- Add control over simulation timescale and stepping through simulation at
fixed rates
- Add example code demonstrating scenario specification with control of a
vehicle that has various sensors attached

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- Add ``move_vehicle()`` method.

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- Pass configured host and port to BeamNG.drive process.

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- Fix ``close()`` in ``BeamNGPy`` not checking if there's even a process to be
killed.

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- Fix messages being split incorrectly when the message happened to contain a
newline through msgpack encoding.