This is a stub/very preliminary implementation of calling JSXGraph for
3D Joyce applets. The only element/construction method implemented so far
is a free point.
NOTE: This implementation is so far extremely buggy. Loading a page with a
3D applet such as
http://aleph0.clarku.edu/~djoyce/java/elements/bookXI/defXI9.html
appears to enter a loop in which the div containing the JSXGraph Board
progressively grows larger and larger, while using a tremendous amount
of cpu.