Experimental GMNX viewer available

Hi Group,

An experimental, open source GMNX viewer now exists to clarify the scope
and purposes of GMNX and help ground our discussions.

It's located here:

   https://joeberkovitz.github.io/gmnx-viewer

Several examples illustrate some of the dimensions of GMNX as it's
currently speced. It's my intent that this viewer will keep tracking the
spec as it evolves -- there's no big investment in the codebase as it
stands (and it's pretty small, at least so far).

I also plan on adding features to make it easy to load arbitrary GMNX files
into the viewer. But for now it's easy enough to check out the repo and add
your own -- just some Javascript and HTML.

A link to the Github repo is on that page.

.            .       .    .  . ...Joe