TimeIntervalCollection, DataSourceCollection, BillboardCollection, ImageryLayerCollection, LabelCollection, PolylineCollection, SensorVolumeCollection
Update CHANGES.md
Remove proxy from most default imagery providers.

ESRI and OpenStreetMap (OSM, Stamen, and MapQuest) all now support CORS headers directly.

Also remove `FeatureDetection.supportsCrossOriginImagery` and related checks which only applied to old WebKit versions (Safari before version 6).
Add polyline loops.
Add Sandcastle example.
Add tests.
Update CHANGES.md.
Tweak CHANGES.md
Add second parameter to Material.fromType to override default uniforms.
Merge pull request #1521 from AnalyticalGraphicsInc/polylineLoop

Polyline Loop
Merge branch 'master' into materialUniforms

Conflicts:
	Apps/Sandcastle/gallery/Polylines.html
Update after merge.
Update CHANGES.md.
Tweak CHANGES.md
Merge pull request #1522 from AnalyticalGraphicsInc/materialUniforms

Material.fromType uniforms
Remove unused modules.
Merge pull request #1520 from AnalyticalGraphicsInc/removeProxyFromImagery

Remove proxy from most default imagery providers.
Merge pull request #1519 from AnalyticalGraphicsInc/getSetProperties

Replace get/set functions with properties: Collections
Merge remote-tracking branch 'upstream/master'