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Improved and expanded the output of the print_frame_order_2nd_degree() function.

The print out can now be in integer form, dots can replace zeros, and commas between elements are
now optional. Matrix forms are also converted to array forms.

The print_frame_order_2nd_degree() function now accepts the epsilon arg.

This allows zero to be defined differently making the printout nicer.

Fix for the new daeg_to_rotational_superoperator() function.

The frame order matrix shape is now restored.

Added a function for converting the frame order matrix to the rotational superoperator.

The function is called daeg_to_rotational_superoperator().

The beta angle for the tensor rotations is now folded to be between 0 and pi.

Fix for the new frame order system test - the results file goes to devnull.

Specific architecture and optimisation details are now printed if the frame order system tests fail.

Renamed a frame order system test.

Added another rigid frame order system test.

Shifted the rigid frame order system test into the sub-directory.