relax SVN archive

Added checks for all of the results files being present in the tmp directory.

Fixes for STDOUT control in the auto_analyses.stereochem_analysis module.

Another fix for the stereochem_analysis system test, the results dir is now in ds.tmpdir.

Bug fix for the snapshot paths.

Enabled the relative stereochemistry analysis system test.

Fixes for the NOE restraint system tests as these involve the N-state model.

Fixes for all the N-state model system tests.

The scripts were moved to a sub-directory!

Added a system test script for testing the relative stereochemistry analysis.

Shifted all the N-state model scripts into their directory.

Created a directory for collecting all N-state model system test scripts together.