* move is* properties to prototypes and remove unused ones

* rebuild

* merge dev -> less-is

* remove rebuild from PR

* convert to ES modules

* rebuild

* move shaders back into glsl files

* reinstate polyfills

- Parameterized geometry (e.g. BoxGeometry) should not clone the base
properties of Geometry.
- CubeTexture: Clone is parameterless.

Provide a clone method to the specialized geometries in
src/extras/geometry, otherwise:
- the `.parameters` are not copied
- the `.type` of the clone is "Geometry" or "BufferGeometry"
- the cloned object is not an instance of the initial type. It loses its
specialization and becomes a plain `Geometry` or `BufferGeometry`.

Class deriving from `PolyhedronGeometry` defined  `this.parameters` all
over the place. Standardize to defining the `.type` and `.parameters`
after the `PolyhedronGeometry` constructor is called.

Also fix prototype inheritance chain for classes deriving from
`PolyhedronGeometry`.

Fixes #5570

centroid was originally used by CanvasRenderer, now that it computes it as needed we don't need the bloat anymore.

rewrote the code to benefit from this change

Removed Vector* add() to addVectors() and addSelf() to add(). Same with sub, cross, min, max, lerp... Renamed Matrix* and Quaternion multiply() to multiplyMatrices(), multiplyQuaternions() and multiplySelf() to multiply(). See #2860.
Good thing we have a ton of examples to make sure nothing is broken. The unit tests also helped. However, I suspect I've left something unchanged.

(Phewww!) I'm sure there are still things I missed...

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/)

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

- Fixed TorusKnot face orientation.
- Added UVs to Cylinder (Cylindrical Mapping) 
- Fixed Lathe UVs

There is something wrong with texture mapping, u needs to be inverted all the time. Something to researching on.

Added geometries example (need to add Lathe one).
Fixed Cylinder.