Give the demos with ground planes of some sort a consistent "up"
direction for the camera, instead of having rotation be able to change
this. Simple change: Trackball to OrbitControls.

Default value is THREE.BackSide (use backfaces of objects when rendering depth map), other valid value is THREE.FrontSide (use frontfaces of objects when rendering depth map).

See discussion in #2683

This makes it safer to compile shaders without maxLights cap. Only per vertex phong code path is sensitive to available number of varyings (together with shadow maps, but you would need to be pretty crazy to have enough shadowed lights to hit varying limits).

Also like this phong material behaves more as expected for large polygons.

Performance wise, for many use cases and systems it's actually similar or even faster.

Fixes #2524

Some things probably could be done still nicer, e.g. using new gui.dat color controllers.

Just emergency fixes to make examples work. Still lot of things with GUI itself are broken :S

Cleaned up custom stats.js styling in examples (thanks to @mrdoob for showing me this is possible ;).

Sorry that you had to add it @alteredq.

Fixed all the examples that used PlaneGeometry except webgl_terrain_dynamic.html (not sure what's going on :S).

Is as it was before, but I implemented the event dispatching in a different way (checking the distance of the object position between frames). Also renamed the 'update' event to 'change'.

controls.addEventListener( 'change', render );

Right now only misc_camera_trackball.html uses this.

At least till we don't have this solved somehow better I think we should keep the old one. New one makes everything using it feeling broken, it's distracting.

Moved new event-driven `TrackballControls` into `TrackballControlsExperimental`. For the moment used just in "misc_camera_trackball.html" example.

Now we can do things like this:

controls = new THREE.TrackballControls( camera );
controls.addEventListener( 'update', render );

Sadly, some examples are slightly broken until we have better pipeline for assets load complete event dispatching.

MD2Character is an object encapsulating character body, multiple weapons and multiple skins as a single entity.