Added very basic interactive tool, SpeedGrapher so people can plot a
route's speed and time by clicking in a window.  The x and y coordinates
would need to be given to Joe's GUI.  Maybe it could be a third tab on
Joe's GUI?  I'm noticing now that one is a JFrame and one is a JPanel.
If it's more work than it's worth, we don't have to use it.  Also I
should note I just took this guy's code and modified it.
http://stackoverflow.com/questions/12257933/drawing-a-line-from-2-mouse-clicks