* Unit vectors are now only checked for in the model-free GUI auto-analysis when needed.
* Full errors are raised in the protected_exec() function if in debugging mode.
* Improvements to the [http://www.nmr-relax.com/manual/structure_vectorstructure_vectors.html structure.vector vectors user function] docstring.
* Created the wizard page spin_control() method for adding a spin control.
* The results file viewer is now executing the [http://www.nmr-relax.com/manual/grace_view.html grace.view user function] to display Grace files.