relax SVN archive

Converted the CSA and bond length value setting test to the new system test framework.

Converted the Bond length value setting test to the new system test framework.

Converted the CSA value setting test to the new framework.

Bug fix for the new system/functional test framework.

Now all tests from all TestCase instances are run.

Started to convert the model-free system tests to the new unittest framework.

The relaxation data reading test has been converted, but no other tests are currently functional.

Clean up of the operation of the --unit-tests and --system-tests command line options.

These now use the Test_suite_runner methods so that the 'relax' file need not deal with the
implementation details of the various test suite categories.

Split the Test_suite_runner.__init__() method into many smaller methods.

This is part of a clean up of the messy base structure of the relax test suite.

Renamed the test suite running module to test_suite_runner.

The results of the new system/functional test framework is now returned.

Added a missing newline.