relax SVN archive

Fixed the Scientific structural object __init__().

The structural data is no longer initialised (again) and the base class __init__() method is called.

Modified the structural object code to store the file name and path.

This will cause some breakages do to the variable name changes.

Modified the test_load_results() system test to check both the file name and path.

These are not yet implemented in relax.

Changed the path to the PDB file to not be absolute.

Wrote the structural object base class method from_xml().

Updated the structure results file.

Renamed an incorrectly named variable.

Added the code to from_xml() to load the structural data.

The from_xml() structural object method needs to be implemented.

Shifted the structural data to the end of the XML results file.

This is in preparation for dumping all the structural info into the file.

The basic structural object data is now converted to XML in the results file.