WebGLRenderer: Avoid flat shading buffer creation when using MeshPhongMaterial and clean up. See #6117.

remove material.ambient from everything per discussion here: https://github.com/mrdoob/three.js/pull/5741#issuecomment-67893202

adds an onStart event to the loading manager
i tried to "mrdoob style" as i went along

Sorry that you had to add it @alteredq.

Preventing setting zero sized EffectComposer (which leads to WebGL and math errors). Also more examples resizing handling.

These ran too fast with v-sync off.

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/)

Also updated corresponding examples.

Lots of code got cleaner with seconds, seems we used them before all around.

Also changed examples that didn't need deltas to simple Date.now() plus some more examples cleaning, trying to get rid of obsolescence warnings.

CrosseyedRenderer is a hack, camera must have target :S.

Found out that CrosseyedWebGLRenderer probably wouldn't work for target-less cameras.
Something weird going on with `webgl_scene_test.html` and `webgl_scene_test_blender.html`. For some reason cubes dissapear.

Hopefully this fixes several problems:

- ambient component not modulated by scene ambient light
- specular component not getting light colors
- unnecessary opacity use in lighting calculations
- unnecessary vertex shader light computation for Phong
- unnecessary use of one varying in Phong

This was relic from before "console.log" was working cross-browser.

WebGLRenderer antialias is off by default (considering Firefox doesn't support it...)
Formatting clean up here and there