Began with incenter.html, the first one alphabetically. Needed one
new point construction method, and a new option to see what was
going on.
Got the planar diagrams on that page working. The next step on #36 will
be to get 3D diagrams as the theorem on this page generalizes to 3D. That
will be a bigger task, so merging this now.
With this loaded in under the Firefox debugger, one can see linked WRL files and Java Geometry Applets on arbitrary web pages.
This represents significant progress on #28, but getting more controls and getting it to work in other browsers is still on deck.
Reviewed-on: #38
Co-authored-by: Glen Whitney <glen@studioinfinity.org>
Co-committed-by: Glen Whitney <glen@studioinfinity.org>
