relax SVN archive

Redesign of the numerical integration method for an ~40 times speed up.

This is currently only for the isotropic cone model. A basic and rough Monte Carlo integration
method has been hand coded to replace the advanced scipy.integrate.tplquad() quadratic integration
function. Not only are the number of integration steps massively decreased, but all PCS values can
be integrated simultaneously. I.e. there is one iteration of the integration algorithm for all PCS
values of all atoms and alignments, rather than one iteration per PCS.

Added the cProfile dependency check.

Enabled the cProfile module when available to massively speed up the profiling.

Updates to the isotropic cone frame order test model data.

Fix for the calculation of the PCS value via numerical integration for cone frame order models.

The surface normalisation factor sin(theta) was missing!

Fixes for the creation of the isotropic cone frame order model PDB representation.

Eliminated the full motional eigenframe of the isotropic cone frame order model.

To define the frame of this motional model, only the central cone axis is required. Therefore the
three Euler angles have been eliminated and replaced by two spherical coordinates of the cone axis.

Fixed an import.

Updated all of the frame order RDC and PCS data back calculation scripts for recent changes.

Converted all three pseudo-elliptical frame order target functions to the new base data design.