* GPGPU Protoplanets example: fix pixel trails

* webgl_gpgpu_water.html: Remove mention to orbiting the camera.

* LDrawLoader: Remove 'var' completely

* Examples: Move postprocessing to ES6.

* Examples: Clean up.

* Examples: Remove XLoader.

* Examples: Remove screenshot.

* GLTFLoader: Add createNodeMesh hook

* GLTFLoader: Call plugins' createNodeMesh() even if core nodeDef.mesh is undefined

* Examples: Convert renderers to ES6.

* Examples: Clean up.

* Examples: Convert objects to ES6.

* Examples: Clean up.

* Examples: Convert animation to ES6.

* Examples: Clean up.

* Examples: Convert cameras and geometries to ES6.

* Examples: Clean up.

* Fix build-examples script on windows

* Fix LGTM warning

* Ignore ifc folder when linting

* Add build-examples script

* Normalize fflate imports

* Wrap the output in an IIFE to avoid polluting the global scope

* Add missing dep

* Remove eslint comment not necessary anymore

* Examples: More ES6 usage.

* Examples: Clean up.

* Examples: Convert helpers to ES6.

* Examples: Remove unused import.

* Bone: Covert to ES6.

* Add super();

* Clean up.

* Add missing `dispose()` methods for AxesHelper and CameraHelper

* Add missing `dispose()` methods for Light and LightShadow

* Add `dispose()` to docs for AxesHelper and CameraHelper

* Add `dispose()` to docs for Lights and LightShadow

* Fix eslint issues

* Replace spaces with tabs in documentation