relax SVN archive

Converted the generic_fns.value code from Numeric to numpy.

Removed the cdp aliases as they are not used very often.

Converted another maths_fns module from Numeric to numpy.

Converted more maths_fns modules from Numeric to numpy.

Converted the data.diff_tensor code from Numeric to numpy.

Removed the Numeric and Scientific packages from the relax prompt namespace.

Shifted the RelaxParamSetError import to the generic_fns.value module.

Added a few more functions to be returned by get_specific_fn().

These include data_init(), default_value(), and set_update().

Big refactorisation of the value setting code. Expect breakages as the changes aren't complete!

The parameter setting set() base class method has been shifted from the specific code to
the generic_fns.value module (and has been converted to a function). This method simply sets spin
specific functions and hence has been renamed to the set_spin_params() function.

Converted the maths_fns.jw_mapping module from Numeric to numpy.