* Moved FrenetFrames calculation from TubeBufferGeometry to Curve

* Curve: Clean up

* ExtrudeGeometry: Removed reference to TubeGeometry

* Fix method link 'ReturnType's of all math object documentation

* Misc Documentation fixes

* move is* properties to prototypes and remove unused ones

* rebuild

* merge dev -> less-is

* remove rebuild from PR

* convert to ES modules

* rebuild

* move shaders back into glsl files

* reinstate polyfills

* CurvePath.getPoints() for Arcs resolution should be doubled

- like previous behaviour
- see #9079

* CurvePath: increase resolution of spline curves

* CurvePath: getPoints() should respect last point

- autoClose behaviour now checks first point
- ShapeUtils.triangulateShape to remove dup points
- #9079
- Thank you @@rfm1201 again!

* Update webgl_geometry_text_pnltri example 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

In the actions array of the Path, the last elements of the args array
need to be the x and y of the last point of the segment added to the
path.
Not the case with splineThru => cause an exception if you add an other
segment after the pline (without a moveTo).
Used the same trick as absellipse does.

the updateArcLengths in CurvePath must clear the local cache,
cacheLengths

* Examples: Removed deprecated THREE.ClosedSplineCurve3

This commit replaces THREE.ClosedSplineCurve3 with
THREE.CatmullRomCurve3

* Curve: Removed reference to deprecated THREE.ClosedSplineCurve3