relax SVN archive

Renamed a number of the data pipes to better reflect what they are.

Model elimination is no longer performed on the global model in the omp_model_free system test.

Fix for bug #12411 (https://gna.org/bugs/?12411).

The problem was with the duplicate_data() skipping the duplication of the spin specific data if the
new data pipe (which should start off as empty) contained no sequence data. Hence the data was not
being copied.

Bug fix for the duplication of sequence data during model selection.

The sequence.copy() function was not preserving the selection flag so that new option is sent into
the copy() and generate() functions, originating from the duplicate_data() model-free method.

Bug fix for the fix() function.

The fix flag for the spins was not being set when the 'all' element was sent into the function.

Extended the system test of a minimal model-free analysis using the OMP relaxation data.

This now includes the basics of the 'final' stage of the 'full_analysis.py' script.

Bug fix for model elimination in 'full_analysis.py'.

Added a check to the 'full_analysis.py' script to avoid model elimination of the global model.

Fix for bug #12409 (https://gna.org/bugs/index.php?12409).

This bug is the failure of the final stage of the 'full_analysis.py' script. If no models exist in
the PDB file, a model number is no longer passed into add_struct().

Added a fix for the aliasing of a PDB file for when no structural data exists in the data pipe.

This is related to bug #12409 (https://gna.org/bugs/index.php?12409), so that rather than an
unrelated RelaxError, the structure is not aliased is the structural data could not be loaded in
another data pipe.

Fix for the checks in the test_load_scientific_results() system test.