Animations: clean up

Update ObjectLoader.js

Editor: fixes scripts container layout error.

WebGLBackground: enable code injection

DirectionalLightHelper: correctly orient helper to face light target

[doc]: SceneUtils: .attach parameters

Rename "e" parameter to "event" in event listeners

Docs: Update BufferGeometryUtils

Makes the scene and parent parameters signature of the attach() method consistent with the explanation.
Minor grammar improvement by making sentences complete.

Having "e" instead of "event" caused error in Firefox. No errors in Chrome.

Editor: i18n

VideoTexture: Set format to RGBFormat by default.

Update Geometry.html 

WebGLRenderLists hashing optimization

Cube Shader: Support decoding, tone mapping, and output encoding

Background Shader: Support decoding, tone mapping, and output encoding

do gpu picking with 1x1 pixel render target

Background Shader: Simplify vertex shader

BufferGeometry docs: clarification

Docs: Clean up

translate math part