relax SVN archive

Fixes to all of generic_fns.diffusion_tensor.ellipsoid().

Wrote a unit test for the setting up of an ellipsoidal diffusion tensor.

Fixes to the unit test for the setting up of a spheroidal diffusion tensor.

Fixed all calls to generic_fns.angles.wrap_angles().

Removal of references to self and run, and an update to the new data storage object.

Converted all the methods of the Angles class into module functions.

Fixes to generic_fns.diffusion_tensor.fold_angles().

Fixes for generic_fns.diffusion_tensor.spheroid().

Wrote a unit test for the setting up of a spheroidal diffusion tensor.

Removed all references to self from the generic_fns.diffusion_tensor module.