You can now add python files with a sample(vec, t) function that has to return
a tuple like this: (0.0, 0.0, 0.0) to create your own shader.

esp: cleanup code. optimize memory and speed

See merge request !2

Add host id in data header

See merge request !1

Remove the check, if addr() method is implemented in subclasses of Fixture, as addr() has been removed.

Adapt changes from ledstrip.py and fixture.py. Use multiple processes: Each fixture has it's own process now.

BREAKS SUPPRT WITH run.py! Use [red: float, green: float, blue: float] arrays in the data array instead of Color objects, due to performance problems.