[gef-dev] Change in ShortestPathConnectionRouter

[Randy Hudson <hudsonr@xxxxxxxxxx>]

The method getLayoutListener() has been
removed from ShortestPathConnectionRouter.  This is a new router that
has been added during 3.1 development.  The change makes the router
easier to use, and removes the potential memory leak should clients be
made to hook and unhook the listener themselves.

The router now manages the listener
internally.  Ideally, I would have made this non-breaking by providing
a bogus layoutlistener which removes itself the first time it is notified.
 But IFigure#removeLayoutListener cannot be called currently while
the notification is taking place, so that wouldn't have worked (yet).

-Randy