Rename 'init' and 'destroy' on custom nodes: https://github.com/xeolabs/scenejs/issues/278
Make 'lookat' and 'camera' nodes publish matrices on scene tick: https://github.com/xeolabs/scenejs/issues/277
Add static getDefaultMatrix method to SceneJS.Camera and SceneJS.LookAt: https://github.com/xeolabs/scenejs/issues/279
Add #log method to SceneJS.Node: https://github.com/xeolabs/scenejs/issues/280
Ability to subscribe to World, View, Camera, Proj and Canvas position separately on SceneJS.Node: https://github.com/xeolabs/scenejs/issues/281
Added 'nodes/prims/boundary' primitive: https://github.com/xeolabs/scenejs/issues/282