faster BufferGeometry.computeBoundingBox()

this directly calculates the min and max of the bounding box instead of using the Box3 methods

create "three.js" npm shim for "three" npm package.

Lathe geometry in the editor

Refactor example: webgl_shading_physical

Added a minimal support of lathe geometry in the editor.

Vector2: added angle() method

Removed deprecated code in other post-processing examples

LatheGeometry not processed by ObjectLoader

LatheGeometry is a standard geometry but it's not processed by
parseGeometries of ObjectLoader.

Dev: convert_obj_three_for_python3.py

Removed deprecated code in webgl_postprocessing_advanced.html

Add ETC1 compressed texture support.