relax SVN archive

The Bmrb.test_bmrb_rw GUI test now uses the base execute_uf() method for the pipe.create call.

This is part of the simplification of the user function interfaces.

A number of the pipe GUI user function front ends now use the wizard page element_*() methods.

This is to simplify the code base.

The scons 'install' target now creates both *.pyc and *.pyo files during installation.

The wizard page element_string_list() method can now create the special Combo_list objects.

The element_type argument is used to select between the default element and the Combo_list object.
This allows this one element to be used for all string list user function arguments, independent of
the GUI element type.

Created the wizard page ResetChoices() method for resetting the list of values in a ComboBox.

This is currently implemented for the wizard_elements.Base_value class.

Created a Clear() wizard page method for clearing a specific GUI element.

This is currently only implemented for the wizard_elements.Base_value class.

The wizard page element_string() GUI element creator read_only flag now defaults to False.

The read_only=True flag to wizard_elements.Base_value now sets a TextCtrl to the background colour.

The wizard_elements.Base_value.SetValue() method now works properly with the ComboBox.

The wizard_elements.Base_value class now can set the element to be read only.