relax SVN archive

Added the bc flag to the RDC and PCS display and write user function front-ends.

This This will allow the back-calculated data to be displayed or written rather than the measured
values.

Increased the efficiency of the relax data store spin system creation.

This becomes noticeable when large numbers of structures are read into relax.

Bug fix for the profiling!

This coding and debugging functionality now works again. This has been broken since the merger of
the multi-processor branch.

Bug fix allowing relax to be run in profiling mode.

This still does not work as the multi-processor branch has broken this coding and debugging
functionality.

Fix for a problem introduced at r14810 - relax uses D and not 2D internally for the RDCs.

This is only a problem if the rdc.read 'data_type' argument is used. This is only a few days old so
will affect no one!

Fix for the paramag.centre user function when a numpy array is used.

Some last fixes, hopefully, for the N-state model code.

Removed the Q factor calculations from metal_pos_opt.py as they should already be calculated.

Clean up of the metal_pos_opt.py system test script.

Fixes for the N-state model optimisation set up if PCS or RDC data is not loaded.