relax SVN archive

Renamed the maths_fns.frame_order.frame_order_matrix_ops module to matrix_ops.

Shifted the maths_fns.pseudo_ellipse module to maths_fns.frame_order.pec.

Removed a pile of unused imports.

Spun out all of the frame order model specific code in frame_order_matrix_ops to separate modules.

Spun out the free-rotor and torsionless pseudo-ellipse target function code into their own modules.

Spun out all of the pseudo-ellipse code from frame_order_matrix_ops into the pseudo_ellipse module.

Completion of the changes of r17321.

The frame_order and frame_order_matrix_ops modules have been shifted into the new
maths_fns.frame_order package.

Shifted the frame order target function code into the new maths_fns.frame_order package.

This will allow for a better organisation of the code and the splitting up of the far too large
frame_order_matrix_ops module.

Bug fix for the quasi-random numerical integration of PCSs in the pseudo-elliptic frame order model.

The back-calculated PCS values were being duplicated and constantly summed at each function call,
killing the target function.

Updated all of the CaM frame order test data optimisation scripts for the align_tensor.init changes.