relax SVN archive

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.

Modified the pipe.display user function backend to show the pipe bundles.

This required the addition of the generic_fns.pipes.get_bundle() function.

Implemented the pipe.bundle user function, including the full description and the back end.

The data store is_empty() method works again - the pipe_bundles structure is now blacklisted.

Shifted the pipe bundle graphic and created a wizard PNG file for the GUI user function.

Created icons for the pipe bundle concept.

Implemented the generic_fns.pipes.bundle_names() function for returning a list of all pipe bundles.

The pipe.create user function now creates pipe bundles in the back end.

The new ds.pipe_bundles dictionary is used to hold lists of pipes associated with the pipe bundle
name as the dictionary keys. The 'bundle' arg is passed into the ds.add() method for storage.