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ability to move multiple robots around. Still needs testing, but
want to get this off my laptop just in case windows decides to do
something stupid ...

static robot map and in the robot tracker applet.

Also add some debug code that will spew to the Java Console, that
I can use next Tim runs a big test; I can use that output to can
a demo for the tutorial page.

are cleared in the display!

page zapping you to that node's shownode page.

Several other fixes to table handling.

Change the pipe webpage to use the timestamps that are now in the
location_info page, to cut down on the amount of data we spit at
the applet, which when things are not moving, is useless data.
This is still not quite correct; I have more changes coming.

* Pass pixels_per_meter to the applet so that it can convert coords
  to meters.

* Use a float formatter thingy to format numbers as X.XX

Note that the java compiler on boss is too old to compile this applet
(not that I am using anything special) so I am committing a compiled
version. Use the jar target in the robots/tracker build directory if
you happen to have a modern version of java on your machine.