Class globals aircraft lowpass

lowpass
==============================================================================
class that implements a variable-interval EWMA (Exponentially Weighted
Moving Average) lowpass filter with characteristics independent of the
frame rate.

SYNOPSIS:
lowpass.new(<coefficient>);

EXAMPLE:
var lp = aircraft.lowpass.new(1.5);
print(lp.filter(10));  # prints 10
print(lp.filter(0));