As per discussion in #1201

Duh, had to read my own explanation of how matrices work ;).

This was redundant as viewMatrix uniform is the same thing.

As per discussion in #1170

This should make it work with cameras having parents other than scene root.

See discussion at issue #1165

Added a silly check on Object3D.add(). It's a quick check and it avoids enless recursivity making the browser silently hang.

Made shadow transparent (albeit doesn't go well with canvas_geometry_earth :/). Updated webgl_multiple_views example for the new IcosahedronGeometry.

Seemed like a few people around the net were looking for one

Not sure about this hardcoded epsilon thing for "isZero", also related strict equality check. Maybe these should be configurable somehow.

Now we can just do console.log(THREE.VERSION). Thanks for the suggestiong @chandlerprall!

Using comments, though I wonder if using "rubric" thing is the right way to organize.