relax SVN archive

Fix for the N_state_model.test_metal_pos_opt system test.

Interatomic data design fix for the N-state model analysis _minimise_bc_data() method.

Fix for the lactose N-state model system test script for the interatomic data design.

The interatomic CH2 vectors are now deselected.

Fixes for the N_state_model.test_pcs_to_rdc system test for the interatomic data design.

Fix for the rdc.write user function backend.

The data is now properly formatted for the relax_io.write_data() function.

Shifted the InteratomContainer.id_match() method into the generic_fns.interatomic module.

This is needed to allow the correct data pipes to be matched.

The InteratomContainer.id_match() method now checks if the spins for the container exist.

This is needed for the InteratomList.add_item() method checks to see if the container already exists
prior to adding it.

Started to convert the Frame Order test suite RDC data to the new interatomic data design.

The interatomic_loop() now skips deselected containers if the new 'selected' flag is True.

This should speed up the function and simplify its usage.

Converted all of the N-state model system and GUI test scripts to the new interatomic data design.