Python: code to animate the flight path
Python: improve animation code
Python: use decaying trail

This has the trail color change as a function of
latency
Python: improve finding sync when parsing log files

Now it checks the sync byte and fast forwards to the next
one which reduces the number of invalid messages that are
parsed.
Python: make as_numpy_array work for enum types
Python: further improve handling arrays

Now the elements come back squeezed to the right size
by setting the dtype to have a size (nelements,) so
apparently that trailing comma is quite important.