A simple example that illustrates selective drawing of BufferGeometry

Fixed vertex shader draw order and replaced x_x variables/functions with camel case versions as per standard.

Moved SpriteCanvasMaterial.html to examples (docs), Fixed src link

Addition of a new simple example that illustrates how you might create a BufferGeometry instance and efficiently cull out different parts of it using a shader.

fixed Number.isNaN

Vector2:rotateAround() clean up

Added rotateAround method to Vector2

These changes update the exporter to work with 3ds Max 2016

Conflicts:
	build/three.js
	build/three.min.js
	src/core/Object3D.js
	src/renderers/WebGLRenderer.js