Changes

This is a minor feature and bugfix release which has improvements for the handling of structural data involving multiple molecules or models and improved support in the [[Category:Steady-state_NOE_analysis|NOE analysis ]] for replicated spectra. Included are fixes for the failure of the [http://www.nmr-relax.com/manual/structure_create_diff_tensor_pdb.html structure.create_diff_tensor_pdb user function] for non-spherical diffusion tensors when no Monte Carlo simulations are present and for the failure of the [http://www.nmr-relax.com/manual/rdc_write.html rdc.write user function] for back calculated RDC data. Full details are given below.