Replace some DOC_TBA comments with real doc
Replace more DOC_TBA comments
Improve CompositePrimitive doc
Merge branch 'master' into doc-tba
Rename CompositePrimitive to PrimitiveCollection
Added options to PrimitiveCollection constructor
Replace more DOC_TBA comments
Merge pull request #1713 from AnalyticalGraphicsInc/moveTerrainToCore

Move terrain to core
Merge branch 'master' into doc-tba

Conflicts:
	CHANGES.md
Merge pull request #1711 from AnalyticalGraphicsInc/doc-tba

Replace DOC_TBA comments
Fix many documentation errors.
Remove redundant link text.
More fixes.
Merge pull request #1714 from AnalyticalGraphicsInc/docFix

Fix many documentation errors.
Merge remote-tracking branch 'origin/master' into quadtreePrimitive