relax SVN archive

Alphabetical ordering of methods.

Fix for the pipe.copy() GUI user function.

The on_apply() method has been renamed to on_display().

Fix for the sequence.read() GUI user function.

The call to execute() has been renamed to on_execute().

Fix for the pipe GUI user functions. A call to on_exit() has been renamed to on_execute().

Renamed all execute() methods to on_execute() and update() to on_display().

The calls to update() from execute() have been eliminated.

The on_apply() method by default now calls on_display().

Renamed the update() method to on_display().

Renamed the on_exit() wizard page method to on_execute().

Created the on_apply() wizard page method.

Fix for the ok wizard button - the method is now private.