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

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!

This is for seeing how camera actually looks (frustum, line-of-sight, up), it's not a camera. Not sure about the name.

Plus added "onUpdate" callback handling also for cube textures.

Updated Closure compiler. Added more verbose compile warnings. Fixed all compile warnings. Started to fix runtime warnings in examples.

For verbose compile warnings to be practical I had to add externs and disable some warnings manually (there were tons of complains about "global this" and "cannot instantiate non-constructor"). Other solution would be to annotate explicitly constructors all over the code base.

(prompted by John Carmack's praise of static code analysis http://altdevblogaday.com/2011/12/24/static-code-analysis/)