Viewer update from Jim Wilson:

Viewer update from Jim Wilson:

Tower View and viewer config is in place.  Note that the interface is
still in a state of flux.  A couple of the config items (namely the
offsets) are still using the old settings.  The tower is hard coded
into the base package for a position off the starting runway at KSFO
and is probably not in the right place for there even.  Looks pretty
cool though!  Tower View is the third view.  If you aren't at KSFO
you'll just see blank space in view 3. It's looking through the earth or
something like that :-).  Important note: zoom in with a few
hits of the "x" key to see the plane better in tower view.