relax SVN archive

Python 3 fixes - the character '\' is now properly escaped as '\\' in the stereochemistry auto-analysis.

Fix for the test suite summary for Python 3.

The test suite now runs, but fails miserably, under Python 3.

Copyright update.

Fix for the running of the test suite under Python 3.

The zip() function used in the loadTestsFromTestCase() function is now an iterator, so it needs to
be passed through the list() function to generate a list.

Fix for the test_parse_token_multi_element_name() unit test, as parse_token() no longer sorts.

Python 3 fix for the generic_fns.mol_res_spin.parse_token() function.

Mixed lists for int and string can no longer be sorted. This sort call is not needed anyway.

Automatically converted the generic_fns.mol_res_spin module to support both Python 2 and 3.

The command used was:
2to3 -w generic_fns/mol_res_spin.py

For running relax with Python 2, the __builtin__.range() function has been replaced with xrange.

This causes large speed ups (speed that was lost with the earlier xrange() to range() conversions),
and memory decreases. For example on one system, the system test time decreased from 513.029s to
487.586s.

The compat module now has the py_version variable specifying if this is Python 2 or 3.

Import fix for the OpenDX mapping package, recently broken with the relative import for Python 3 change.