relax SVN archive

Added the edit-rename Oxygen icons.

Created a new String_list wizard GUI element class and associated element_string_list() method.

This special object is currently very similar to the input_field() object, but is set up as a class
in the gui.wizard_elements module. The wizard page element_string_list() method has been added as
the interface for adding this element to a wizard page. This method stores the String_list element
in the wizard page _element dictionary.

Created a new infrastructure in the wizards for handling more advanced GUI elements.

The _elements dictionary has been created to store the full GUI elements within the wizard. The
GetValue() and SetValue() methods have been created as a front end to the specific GUI element's
equivalent methods.

The Mf.test_write_results system test now checks for the ancient PyXML.

This ancient version from 2004 which should be eliminated, if installed, causes the toprettyxml()
changes in Python 2.7.3 to be overridden.

The XML system information print out now uses the dep_check module XML data.

Added the xml module import tests to the dep_check module.

This also adds some code to differentiate between the ancient and dead PyXML which should be
eliminated for Python 2.7.3 onwards and the Python internal XML module.

Improved the XML module system information print out.

The relax system information print out now includes information about the XML modules.

Added an initial but far from complete bmrb.citation user function page and menu element.

This user function will require a new type of wizard element to handle the list of authors!

Added the BMRB icon in various sizes to the graphics directory and icon paths.