Utils: Remove Maya exporter

Editor: Fix triangle counting for indexed buffer geometry.

Fixed some lgtm errors.

Added Sprite.copy() method

Add Sprite pivot property

Editor: Improved startup camera/grid.

WebGLRenderer: Removed renderTarget from scene.onAfterRender()

Updated the render target link

Looks like the page location has changed on the MSDN site

Box3: new method intersectsTriangle

add TrOneIsOpaque option to MTLLoader

Release the reference to the current renderList at the end of .render()

Fix scene.onAfterRender arguments order in webgl_tiled_forward.html

WebGLRenderer: Enable rendering without index and position attribute

update {cylinder, circle, cone, ring, sphere, torus, torusknot} buffer geometry docs

Fix GLTFExporter processAnimation()

Docs: Clean up geometry.js and material.js

Docs: Add note about barycentric coordinates in triangle.containsPoint() docs

Fix Quaternion.conjugate method