Update test/benchmark/benchmarking_float32array_accesspatterns.html

Added chart script and a <canvas> element to display a chart with benchmark results.
Update test/benchmark/core/Float32ArrayAccessPatterns.js

Added chart output, horizontal bars, one for each benchmark suite.
Add isIntersectionSphere to sphere

Tets if two spheres intersect
Add unit test, fix is isIntersectionSphere

Add missing space
Fix isIntersectionSphere
Addunit test for isIntersectionSphere
Docs: AmbientLight hint as suggested by @WestLangley. Closes #2872.
Merge remote-tracking branch 'Fox32/dev' into dev
Updated builds.
Docs: Removed now unneded description in AmbientLight. Thanks @WestLangley.
Renamed Sphere.isIntersectionSphere to Sphere.intersectsSphere.
Also, code clean up here and there.
Updated builds.
Merge remote-tracking branch 'bhouston/geometry-mergeVertices-fix' into dev
Updated builds.
Merge remote-tracking branch 'bhouston/arrowhelper-fix' into dev
Cleaned up ArrowHelper code a bit.
Cleaned up Box3.
Removed ArrowHelper from SpotLightHelper.
I think it's a bit redundant.
Added .add(), .addColors(), .addScalar(), .multiply() and .multiplyScalar() to Color. Removed ArrowHelper from DirectionalLight too.
Updated builds.
Added "teechart-benchmark.js" to simplify/reuse
Fixed chart output. Now its sorted, and less code