Merging graphics branch

[Michael Goffioul]

On Mon, Jun 16, 2008 at 12:14 PM, Michael Goffioul
<michael.goffioul at gmail.com> wrote:
> Not an exhaustive list, but I would say that the main features are:
> - OpenGL-based graphics renderer
> - FLTK-based windowing backend
> - dynamic properties (addproperty)
> - property listeners (addlistener)

I forgot this one:
- hggroup objects

Michael.