relax SVN archive

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.

Fixes for the unit tests for the align_tensor.init user function changes.

The align_tensor user functions now use the align_tensor.get_tensor_ids() function.

They were previously using align_tensor.get_ids() and returning the alignment IDs, causing failures
in a number of GUI tests.

The rdc and pcs user functions now use align_tensor.get_align_ids() rather than get_ids().

This is a fix for the rename in the previous commit.

Renamed get_ids() to get_align_ids() and created get_tensor_ids().

This is to allow the retrieval of either tensor or alignment IDs separately.

Updated the system tests for the align_tensor.init user function changes.