relax SVN archive

The auto-generated Uf_page.add_contents() method now raises a RelaxError if the Python type is unknown.

The menu_text variable now defaults to '' so that the GUI does not die if this is not set.

Removed the wiz_desc args from the pipe user functions.

Eliminated the wiz_desc argument in the auto-generated user functions.

Now the desc_short arg will be used instead for the GUI user function elements.

The desc_short rather than wiz_desc arg is now used for the GUI elements.

This is for the auto-generated user functions.

The wiz_desc arg is no longer compulsory for the auto-generated user functions.

This will eventually be merged with the desc_short arg anyway.

The GUI test execute_uf() base method now operates with the auto-generated user functions.

Removed the Page_storage singleton object as the idea does not work.

While the pages cannot be recycled, a fundamental problem is if a wizard with the page is run at
the same time as the user function page. More than one copy of the page must exist at the same
time!

Advancements for the auto-generated GUI user functions.

String list GUI elements are now supported. The wizard element are now updated on display, allowing
for example the current set of data pipes to be displayed in the ComboBoxes of the pipe user
functions.

The List and Combo_list class now have ResetChoices() methods.

This allows these elements to fit with the auto-generated GUI user functions.