Functions useful for creating bounding spheres from boxes
Added fromArray to Cartesian2 and Cartesian4 for consistency
Added distance to Cartesian2 and Cartesian4 for consistency
Remove whitespace
Update based on review
Merge pull request #548 from AnalyticalGraphicsInc/modelhelpers

BoundingSphere and Cartesian functions
Fix jsHint error.
Merge branch 'master' into pathResolution

Conflicts:
	CHANGES.md