Bugfix - Correcting dynamics calculations
Bugfix - Correcting dynamics calculations

Fixing the calculation of alpha, adding back the factor of 2 to the
denominator so that the baseline is on 0.

Also fixing the computation of the parameterised translational function,
which was using the signed orientational distance rather than the
absolute rotation.

malramsay64/MD-Molecules-Hoomd,malramsay64/MD-Molecules-Hoomd