relax SVN archive

Fixed a unit test for the Scientific_data.atom_loop() method with the '@163' spin selection.

2 unit test functions had the same name, so only one was being run.

The PipeContainer.__repr__() unit test are now stricter, checking for returned strings.

Added a tearDown() clean up method for the unit tests of the PipeContainer.

Fix for the PipeContainer.__repr__() method.

The is_empty() function is skipped.

Added two simple unit tests for printing out the contents of a data pipe.

This tests the PipeContainer.__repr__() method.

Disabled the unit test for spin selections with parentheses.

This test can wait until someone tries to implement the feature.

Added a system test for the loading of spins from a small molecule.

This uses the Scientific Python PDB data object.

Fixed all the test suite tests pointing to the renamed 'test.pdb' file.

Renamed one of the test suite PDB files.

Added a directory for the structural data of the test suite and added a small molecule structure.