This adds Vector3.getRotationFromQuaternion and changes Object3D.applyMatrix to use Matrix4.decompose.

Also added SceneUtils.attach / detach and cleaned up unused vector parameter in Geometry.applyMatrix.

Renamed Vector3.setRotationFromMatrix() to Vector3.getRotationFromMatrix().
Added Vector3.getScaleFromMatrix().

As usual, it's up to caller to cache the value if it's not used right away.

Had to use Matrix4's internal matrix to avoid circular cross-dependency between Vector3 and Matrix4 (added extra internal matrix m3 for this not used anywhere in Matrix4 itself to minimize chances of messing up something).

As per discussion in #1324

This fixes geometry tessellation example (before TextGeometry by default was having UVs defined for just a subset of faces).

Also trying to make a bit nicer UVs for ExtrudeGeometry / TextGeometry.

Seems horse model was wrong, it had one extra frame at the end (almost identical to the first frame), which caused our animation playback code to be incorrect in order to accommodate for this.

Side-effect was that two frame animations were completely broken.

Bah.

Also updated build script to fill in missing dependency (ImageUtils => DataTexture).

As per discussion in #1256

Default computation of morph normals for all models with morphs was taking unnecessary time and memory.

Also made it less resource intensive to recompute morph normals.

It seems to work, though not sure yet how to handle some things. Also for the moment it's implemented just for Lambert material.

As per discussion in #1207

Shadow cascades should be now a bit more under control.

Cascades can't be active together with multiple separate shadows, it's either one or the other. For this there is `renderer.shadowMapCascade` parameter.

Made colored shadow frustum debug visibility toggleable via `renderer.shadowMapDebug` parameter.

Fixed runaway globals in ShadowMapPlugin.

Fixed missing Gyroscope dependency in WebGL lib build.

As per discussion in #1170

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

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

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!