remove prototype functions from AxisAlignedBoundingBox, BoundingRectangle, BoundingSphere, Plane, Ray and Spherical.
cleanup, update CHANGES.md
Merge branch 'master' into removePrototype

Conflicts:
	Specs/Scene/PolylineCollectionSpec.js
revert clone, equals
Tweak CHANGES.md
clean up specs
revert intersect
Merge branch 'master' into removePrototype

Conflicts:
	Specs/Core/BoundingSphereSpec.js
require ray
Merge pull request #1564 from AnalyticalGraphicsInc/removePrototype

Remove prototype functions