relax SVN archive

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.

Shifted the dummy file object into the relax_io module.

Created an object which mimics the file object by providing the write() method.

This is to catch the output of the results.write() method and to store it in a string.