relax SVN archive

Bug fixes for the unit test of setting up of a spherical diffusion tensor.

Bug fix for generic_fns.diffusion_tensor.test_params().

Removed self and added the cdp alias.

Bug fix for generic_fns.diffusion_tensor.set().

The current data pipe is now aliased.

Removed all the references to self in generic_fns.diffusion_tensor.return_data_name().

Removed all the references to self in generic_fns.diffusion_tensor.set().

Sent a number of variables into the sphere, spheroid, and ellipsoid functions.

Converted the docstring of generic_fns.diffusion_tensor.init() to the epydoc format.

Updated the generic_fns.diffusion_tensor.sphere() function.

Updated all the functions to handle the new diff tensor data structure.

Bug fix for the generic_fns.diffusion_tensor.init() function.

The new data structure is taken into account.