relax SVN archive

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.

Shifted to RelaxTestRunner for the new system/functional tests to catch STDOUT.

Added the missing import of the relax data storage object into the pipe creation system test.

System_test_runner.run() is no longer called with the runner argument.

Fixed the reference to the now non-existent 'pipe' variable.