relax SVN archive

Updated the value.set() user function.

More comments were added to the code, and empty lists passed in as the param argument are now
checked for.

Updated the val arg unit test of the value.set() user function.

The unit test now properly checks the arg when a list is passed into it.

Bug fix for the value.set() user function.

Empty lists are now caught.

Implemented the generic_fns.minimise.reset_min_stats() function using the new relax design.

This was copied from the old reset_min_stats() class method but has had a few significant changes
made to it. Now both the sequence specific and global min stats are reset all together by one call
to the function.

Bug fix in the generic_fns.value.set() function.

The self.relax.generic data structure no longer exists.

Bug fix in the generic_fns.value.set() function.

The diff_params variable is now called tensor_params.

Updated the generic_fns.align_tensor.matrix_angles() function to include the basis_set argument.

Wrote a unit test for the align_tensor.matrix_angles() functions.

Added the basis_set argument to the align_tensor.matrix_angles() user function.

Implemented generic_fns.align_tensor.matrix_angles() function.