relax SVN archive

Import fixes for the module.

Added a test to make sure that the model selection data pipe doesn't exist.

Removed an unused ancient variable.

Added a missing import.

Fix for the res_name arg unit test of the residue.create() user function.

Reverted the removal of the call to the specific duplicate_data() method.

Fix for the residue.create() user function. The residue name is not necessary.

Wrote a system test for the loading of NMRView peak lists.

This comes from Ryan Hoffman's (https://gna.org/users/rydog) feature request attached to bug #11913
(https://gna.org/bugs/index.php?11913).

THe NMRView system test framework is now loaded by the system test runner.

Added the framework for system tests for supporting NMRView within relax.