Fix geometries without indices
Ambient light workaround
Update CHANGES.md
Add specs for PrimitivePipline geometry packing.
Merge pull request #1675 from AnalyticalGraphicsInc/indices

Fix geometries without indices
Merge remote-tracking branch 'origin/master' into lighting

Conflicts:
	CHANGES.md
Merge pull request #1680 from AnalyticalGraphicsInc/lighting

Improve lighting
Merge remote-tracking branch 'origin/master' into renderer