relax SVN archive

The pipe editor window now handles the pipe bundling concept.

There is a new button for the pipe.bundle user function, a new column showing the pipe bundles, and
the pop up menu allows pipes to be associated with bundles if not already bundled.

The pipe.bundle user function back end now notifies all the pipe_alteration observers of the change.

This is required for proper GUI interaction.

Refinements to the pipe.create user function definitions.

Improvements to the GUI analysis wizard.

These changes should have been part of r16638 - they fix the test suite for the GUI pipe bundle changes.

The GUI analysis tabs now work with data pipe bundles rather than the original data pipe.

The analysis wizard now uses the unique name for the new data pipe bundle field, and the starting
data pipe defaults to 'origin'. The analysis pages show the bundle name rather than associated data
pipe.

Fix for the resetting of the relax data store - the pipe bundle object is now being recreated.

Fixes for the test_pipe_bundle() system and GUI test.

The pipe.delete user function is now cleaning up the data pipe bundles as needed.

The deleted data pipe name is removed from any bundle it is in, and empty bundles are eliminated.

Implemented the generic_fns.pipes.has_bundle() function for determining if a bundle exists.