* Created the frame_order.domain_to_pdb user function to associate PDB files with domains in the current data pipe.
* Rewrote [http://www.nmr-relax.com/manual/frame_order_pdb_model.html frame_order.cone_pdb] to handle all of the frame order models.
* The sign of the RDC can be inverted to correct for the negative 15N <sup>15</sup>N gyromagnetic ratio.
* Better identification of the molecule end in the internal PDB reader.
* Implemented Monte Carlo simulations for the N-state model.