Canvas Renderer

[ffflabs]

1. Adds a canvas renderer fallback to threejs-layer.js. For this, there's a new webgl property that basically mimics the one in detector.js. If no webgl context is detected, the lib will instantiate a THREE.CanvasRenderer object.
2. Fixes the example accordingly. The fallback renderer can be forced by adding renderertype:'Canvas' to the constructor

new ThreejsLayer({ map: map,renderertype:'Canvas' }, function(layer){
...
});

1. Replaces the version of three.js in /lib for the full r68 version. For some reason, the version you had didn't had the THREE.SpriteMaterial object.

[aemkei]

Wow, thanks for this!