Values are now mandatory. This should avoid corner dpr cases.

The docs for color indicate that setRGB et all take colors between 0 and
1, but the tests use 255 based values. Updating to reflect docs.

The unusual values were used to avoid floating point math errors.

Also added some minor things which fail in jshint

GeometryExporter: Considering the engine doesn’t support quads anymore, the isTriangle code is now dead.

@algrs ok, I think I managed to get it to work now. I’m keeping a vertices array to map indices per object.

The WebGlRenderer.render's forceClear argument forces a
clear -only- for buffers with their .autoClear property is set to true.

Took me a while to find a bug in my code as I didn't understand
these flags overode the forceClear parameter for WebGlRenderer.render