relax SVN archive

Missing import and fixed the initialisation of Wiz_panel.

The GUI and interpreter objects are no longer passed into Wiz_panel.

This is only for the user function specific classes, and is performed in UF_panel instead.

The value.set() GUI user function now uses the new wizard.

The dialog ShowModal() and Destroy() methods are now executed by the wizard run() method.

Modifying the user function 'read_xyz()'.

This is Han's patch https://gna.org/task/download.php?file_id=13243 attached to the task
http://gna.org/task/?7404.

In the user function generic_fns/structure/main.py a single blank line was removed.

The wizard size and title are now class arguments rather than hardcoded variables.

Created the UF_panel class derived from Wiz_panel for the user function specific wizard panels.

Created the Wiz_window.display_page() method for displaying the given page.

Created the add_page() and run() methods for the Wiz_window class.

These are currently non-functional.

Temporarily turned off all user functions, save value.set().

This will be used to redesign all of the wizard and user function dialogs and panels.