relax SVN archive

Modified the lib.arg_check.is_str_or_inst() function to work with Python 3.

Instead of checking for cStringIO.OutputType, which does not exist in Python 3, the argument is
simply checked to see if it has a write() method.

Removal of another temporary debugging printout.

Removed a debugging printout fatal for Python3.

Modified the lib.arg_check.is_str_or_inst() to handle cStringIO objects.

This allows sys.stdout to be used as a file object in the relax test suite.

Loosened some checks in the Structure.test_align system test to allow it to pass.

Some self.assertEqual() checks for the atomic coordinates have been replaced by
self.assertAlmostEqual() to allow for small machine precision differences.

Fix for the new structure.align user function.

The translation and rotation of the structures at the end to the aligned positions was being
incorrectly performed.

Bug fix for the CONECT records created by the structure.write_pdb user function.

The atom numbers inside the structural object were being used for the CONECT records rather than the
atom numbers used within the PDB file.

Another bug fix for the structure.delete user function when deleting individual atoms.

The bonded atom data structure consisting of indices requires all indices after the deleted atom to
be decremented by 1.

Expanded the Structure.test_delete_atom system test.

This is to show that the structure.write_pdb user function fails after a call to the
structure.delete user function to delete individual atoms.

Created the Structure.test_delete_atom system test.

This is used to test the deletion of a single atom using the structure.delete user function.