Add isIntersectionSphere to sphere

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

Add missing space
Fix isIntersectionSphere
Addunit test for isIntersectionSphere
Merge remote-tracking branch 'Fox32/dev' into dev
Updated builds.
Docs: Removed now unneded description in AmbientLight. Thanks @WestLangley.