get.track.densities.3d: Extract tldCube and autodifferences functions from a consistent track
Description
Get densities creates a list consisting of the 3 dimensional
probability distribution cube for turning angle, lift angle and step length (turnLiftStepHist)
as well as the uni-dimensional distributions of the differences
of the turning angles, lift angles and step lengths with a lag of 1 to maintain
minimal level of autocorrelation in each of the terms.