* Adds a BVH Loader & example #5524

* bVHLoader example fixed empty mesh errors.

* BVHLoader: replaced internal quaternions with THREE.Quaternion

* added BVHLoader example to example files

* removed arrow function notation

* BVHLoader example: replaced example animation.

GitHub makes everything so easy these days!

syntax error for "print" on:
Line 388
Line 2066

* start of background pass test.

* get clear pass and texture pass working well with each other.

* cube texture pass works.  render pass now obeys Pass.clear.  CubeTexturePass supports opacity.  TexturePass doesn't write to the depth buffer.

* get rid of temp matrix.

* add to files.js.  better title.

* remove unused scene parameter from CubeTexturePass.

- api: simplify.modify( geometry, reductions ) gives new geometry

* fix for retina screens

* q param to prepopulate filter on examples

* removed polyfill

* added to /docs too

* Consistent getPoints and getSpacedPoints on ellipse

They work as getSpacedPoints used to (but with the final point)
The arc between aStartAngle and aEndAngle is always forced in the 0, 2
PI area, as getSpacedPoints did (but not getPoints)

* Refactor Path class

- got rid of .actions
- getPoints() moved to CurvePath
- toShapes() moved to new class ShapePath

* Path: simplify usage of this.currentPoint

* Optimize LineCurve.getPoint(1) as suggested by @rfm1201 in #8952

- this minimizes some floating point errors when t = 1

* Fix up missing changes to CurvePath and EllipseCurve

- as commented by @rfm1201
- using f040453 as reference

* Path: update currentPoint for .splineThru(), add automatic lineTo()

- for ellipse

* CurvePath: address some removeDuplicatesInAPath() concerns

- also cleanup some old reference to .actions

* Path/CurvePath getPoints() shouldn't return sequence of duplicate points

* In path.absellipse, lineTo is drawn only to connect existing path

- when necessary

add support for explicit clearColor clearAlpha on ClearPass, as well as the ability to render to screen. (#9154)

(better output in profiling tools)

happening

* add Color.sub()

* add tab

* if result is negative set to 0

* revise doc of color.sub()

* New ammo.js lib version. Physics demos: terrain and rope.

* Physics demo: Cloth and wall.

* Physics demo: Soft volumes.

* Added physics demos to files list.