relax SVN archive

Modifications to the DummyFileObject class to better act as a file object.

Started to check the contents of the model-free results file from results.write().

Added epydoc comments to the DummyFileObject.write() method.

Added a close() method to DummyFileObject.

Fix for the new test_write_results() system test.

Modified open_write_file() to catch and return objects with write methods.

Modified results.write() to allow any object with a write() method to be used as the output file.

Added the base of a system test for the writing of relax 1.3 model-free results files.

Added a readlines() method to the dummy file object.

Renamed the dummy file object class.