Remove sample coverage to keep in sync with glTF 0.8
Update model tests for glTF 0.8 update
Merge remote-tracking branch 'origin/master' into gltf-8-tweaks
Start of DataSource support for geometry outline width

1. Add `outlineWidth` property to all geometry graphics objects.
2. Update Updaters to expose outline information.
3. Fix issues in DataSource geometry specs.
Initial commit to add support for 32 bit index buffers in Terrain Tiles.
Adjusted ambient lighting to brighten scenes that use terrain vertext lighting.
Merge branch 'terrainIndices32bit' of https://github.com/abwood/cesium into terrainIndices32bit
Fix bugs in ComponentsEntityCollection

1. `onCollectionChanged` handling was not properly resetting a value to undefine for each iteration of a for loop, leading to the first entity incorrectly being the target for all merged properties.
2. Fix bug in `Entity.merge` which was causing custom properties registered on the source entity to not propagate to the target entity if they did not already exist.
3. Added specs to expose both issues.

Fixes #2180
Cleanup.
Added unit tests for testing Quantized-Mesh tiles with 32bit indices.  Minor cleanup.
Merge remote-tracking branch 'agi/master' into terrainIndices32bit
Updated Changes.MD.  Merged in agi/master
Added IndexDatatype.createTypedArrayFromArrayBuffer.  Using this new method and the original IndexDatatype.createTypedArray throughout.
Cleanup.
Updated unit tests to use waitsForPromise where appropriate.
Unit tests for IndexDatatype.createTypedArrayFromArrayBuffer
Clean up use of primitives.add in Sandcastle examples
Merge pull request #2185 from AnalyticalGraphicsInc/composite-fixes

Fix bugs in CompositeEntityCollection
Unit test polish.
Merge remote-tracking branch 'agi/master' into terrainIndices32bit