relax SVN archive

Wrote the Relax_data_store.xml_read() method.

Bug fix for the Relax_data_store.xml_read() method. The self arg was missing!

Fix for the determine_format() function. Only the text "<?xml" is now used to identify an XML file.

Bug fix for the read() function, the file_path object did not exist.

Modified the test_write_results() system test for cross-platform support.

Added a system test for reading a relax 1.3 model-free results file using results.read().

This included the addition of the object_comparison() method for comparing the equality of the
contents of two objects.

Fix for the DummyFileObject.readlines() method.

The last line is empty because of the split() call, and should not be returned.

Added tests for the contents of the results file in the test_write_results() system test.

Added the final OMP model-free results file (from relax 1.3) with the simulations truncated.

Fix for the test_write_results() system test.