relax SVN archive

Added some checks for the final mfout file.

Fixes for the checks of the test_palmer() system test.

Fix for the Modelfree4 controlling sample script.

This matches the fixes of r7652.

Fix for the extraction of mfout file data in the Modelfree4 system test.

Fixes for the relax data store singleton 'add()', 'to_xml()', and 'from_xml()' methods.

These were referring to the contents of the singleton as self, whereas in reality with the current
temporary implementation it is stored in self.instance. Hence the singleton wasn't operating on
itself.

Removed the 'format' arg from results.write() and results.display().

This is no longer used as the only supported format is now XML.

Bug fix for the extract() function.

Added checks to the Modelfree4 system test.

Changes to the model selection print out.

Fix for the setUp() method. The 'palmer' data pipe shouldn't be created!