relax SVN archive

Created the special Selector_file wizard element object.

This is modelled on the file_selector() wizard page method.

Created the element_dir_sel() and element_file_sel() wizard page methods.

This will require the selector objects to be written!

The auto-generated GUI user functions objects now support the special UI types.

This includes the file and dir selection dialogs, and skipping the dir args.

The arg_type argument for the auto-generated user functions is now accepted.

This will be used to allow special UI elements to be used for the argument, for example a file
selection dialog.

Integers and string list of lists are now accepted by the auto-generated GUI user functions.

Expanded the wizard page element_int() method to accept all the args of element_string().

All these args will be handled properly by the Integer class as this derives from Base_value.

The list_titles arg is now accepted for the auto-generated user functions.

This is for a list of lists, and are the titles for the lists.

Missing import.

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.