relax SVN archive

Bug fix for the relax_data.copy user function - it can now handle spins without relaxation data.

Bug fixes for the model-free back-calculation for the interatomic data design.

Fix for the dipole_pair.define user function for when no structural data is present.

The sequence.attach_protons user function now sets the proton element and isotope types.

This reduces the amount of work required from the user.

Rearranged the spin.element user function arguments.

Bug fix for the model-free overfit_deselect() method - again for the interatomic design.

Created the sequence.attach_proton user function.

This will be useful for analyses which are missing structural data.

The dipole_pair user functions now fail if nothing could be done.

This is for the dipole_pair.define, dipole_pair.read_dist, and dipole_pair.set_dist user functions.

Another fix for the model-free calculate() method.

A fix for the model-free calculate() method for the interatomic data design.