relax SVN archive

Created 3 unit tests of the maths_fns.rotation_matrix.R_axis_angle() function.

These are almost identical to those of quaternion_to_R().

Created 3 unit tests of the maths_fns.rotation_matrix.quaternion_to_R() function.

Fix to the frame order system tests.

This corresponds to the fixes in R_euler_zyz() where the rotation matrices were in the left-handed
universe and hence the rotation was back to front.

Fixes for the test_func3() and test_func4() unit tests.

The rotations were backwards because of the R_euler_zyz() fix!

Bug fix for the R_to_euler_zyz() function.

This matches the important bug fix in the R_euler_zyz() function.

Removed the incorrect part of the R_euler_zyz() docstring.

Fix for the R_euler_zyz() function.

The rotations were being performed in the opposite direction?!?

Fixes for the R_euler_zyz() unit tests.

Added some unit tests for the R_euler_zyz() function.

This tests some basic axis rotations.

Fix for the __update_model() method.

The theta_axis, phi_axis, and theta_cone params were not being added to the parameter array!