zoomMin zoomMax possibly switched

I was looking at the code here:

https://github.com/gl-vis/gl-plot3d/blob/0ae1280e1d366fcf96419b6acd85c194ee1f43a6/scene.js#L120

and was wondering if it was meant to be 
```js
zoomMin: options.camera.zoomMin || 0.1, 
``` 
(and vice versa on the following line)
