Some broken stuff... :/

Keeping the old IcosahadrenGeometry and OctahedronGeometry to double check results later.

Conflicts:

	src/extras/loaders/ColladaLoader.js

This was causing troubles for camera changing mid-frame (like for shadow maps).

This is for easier visual checking of RGBA encoded depth maps.

It's Object3D subclass that takes a position from the scene graph hierarchy but uses its local rotation as world rotation.

It works like real-world gyroscope - you can move it around using hierarchy while its orientation stays fixed with respect to the world.

To have lighting consistent with shadows when using target.

Before SpotLight was a weird mix of shadow casted from PointLight and light casted from DirectionalLight.

After shadow mapping fixes orthographic shadow projection finally started to work.

Work in progress. Still need to figure out some way to set up shadow camera automagically with respect to the actual camera (so that whole scene is shadowed when the camera moves). For the moment shadow camera needs to be handled manually (like for SpotLight).

As per discussion here: https://github.com/alteredq/three.js/commit/835b57addaf328412b61a2b644ff5efd7fe6d25e