Messing with ellipsoid distances.
Merge branch 'grid-material' into ed-test-ellipsoid-dist

Conflicts:
	Apps/Sandcastle/gallery/Volumes.html
	Source/Shaders/EllipsoidFS.glsl
Work in progress
Merge branch 'grid-material' into ed-test-ellipsoid-dist
Set up a uniform and JS variable for maximum texture repeating on Ellipsoids.
Merge branch 'ed-test-ellipsoid-dist' into grid-material
Trying to make "lineThickness" values behave like pixel units.