First cut at DynamicScene/CZML WallGeometry support.
Merge branch 'master' into dynamicScene-wall-geometry
Merge remote-tracking branch 'origin/master' into dynamicScene-wall-geometry
Merge remote-tracking branch 'origin/master' into dynamicScene-wall-geometry
Merge remote-tracking branch 'origin/master' into dynamicScene-wall-geometry
Merge branch 'dynamicScene-rectangle' into dynamicScene-wall-geometry

Conflicts:
	Source/DynamicScene/CzmlDataSource.js
	Source/DynamicScene/DataSourceDisplay.js
Specs and cleanup for DynamicWall.
Merge remote-tracking branch 'origin/dynamicScene-wall-geometry' into kml