* Added new examples section and started moving files

* Finished moving files to examples section

* Finished alphabetizing

* added missing methods

* Finished add methods

* redid changed to WebGLRenderer.html

* Created constants / renderer

* renamed Renderer.html to WebGLRenderer.html

* updated webglrenderer docs to reference GLState constants

* Improved doc / Contants / GLState

white space and a few method tags

pedant mode on.

camera, core and math  dirs + a stray "]" in WebGLRenderer docs

* Legacy: Moved EventDispatcher.prototype.apply.

* WebGLShadowMap: Renamed face selection parameters.

* WebGLShadowMap: Clarified code.

* WebGLShadowMap: Renamed face selection parameters.

* Don't treat render targets like textures.

Expect Texture instances from now on. Added backwards compatibility
measures to ensure that render targets can still act as textures for the
time being. A deprecation warning will be given. Resolves #8615.

* Added comments to clear up RT-Cube detection.

* Revised the previously added comments.

* Added a TODO note.

Forgot to include this one in the last commit.

* Documentation: updated WebGLRenderTarget.

* Docs: added more Texture info to WebGLRenderTarget.

Also removed an unnecessary html line break.

* Docs: added a notification to ShaderMaterial.

WebGLRenderTarget and WebGLRenderTargetCube must not be used as
uniforms. Their texture instance must be used instead.

* Docs: revised a notification in ShaderMaterial.

* Removed useless and outdated ShadowMapPlugin docs.

* Consistified WebGLState, added culling.

* Let WebGLShadowMap set culling through WebGLState.

* WebGLShadowMap: Removed redundant state setup.

* WebGLRenderer: Removed needless factorization.

* Removed cull state mess from WebGLShadowMap.

- Instead flip .side on the depth material with the same effect.
- See #8760.

* Updated builds.

* Improved precision of RGBA fixpoint packing.

* Added switch to enable double-sided shadow casters.

- Off by default, see #8692

* Updated WebGLRenderer docs, shadow mapping.

* Enabled back face shadows, webgl_clipping_advanced.

* Implemented user-defined clipping planes.

* Renderer: Minor documentation update.

* Implements object-level clipping.

* Renderer: Minor cosmetic changes.

* Fixed lethal typo in normal shader.

* Let shadows respect .side of object's material.

* Fixed Plane.applyMatrix4.

- Scale denormalized but did not scale the position
- Projection is not supported (solved by documentation)
- Removed unnecessary copying to make up for the normalization
- Still arguably too heavy

* Added custom clipping example.

* Clipping: Fixed transition to disabled state.

* Improved custom clipping example.

- GUI dependency of volume visualization on Enabled state
- Larger radius for cylindrical global clipping area

* No .matrixAutoUpdate = false in clipping example.

* Let ShadowMap check renderer.localClippingEnabled.

* Added a simplified clipping example.