relax SVN archive

Fixes for the PCS calculation.

The PCS is now calculated for each spin.

The PCS constant is now being calculated.

A few modifications for the PCS.

Generated and added the synthetic RDC data.

Created a script to generate RDC and PCS data for a synthetic alignment tensor.

PCS data still needs to be generated!

Created a directory for CaM RDC and PCS test data.

Added a PDB file containing the N, H, and calcium atoms of Bax's 1J7P structure.

This will be used in the creation and testing of optimisation of alignment tensors from RDCs and
PCSs.

Fix for the __linear_constraints() method.

The last probability N is not in the scaling matrix! Therefore don't scale.

The __linear_constraints() method now handles the N-state models without probabilities.