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.
Start of WEBGL_debug_shaders
Report when link fails
Fix deleteProgram
Cleanup CSS in Hello World.
Pack position attributes with rotation and scale.
Properly clear gutter markers in Sandcastle

I was using `clearGutter` incorrectly, which resulted in the problem.
In order to match the old behavior, we now declare 4 gutters and clear them
out as needed.
Further simplify the CSS in Hello World.
Merge pull request #2228 from AnalyticalGraphicsInc/sandcastle-gutters

Properly clear gutter markers in Sandcastle
Add parameter to BingMapsImageryProvider to allow changing the culture of the imagery.
Fix QuantizedMeshTerrainData test failure.
Compress pixel offset, direction, horizontal origin, vertical origin, show, and translate into 3 floats.
Initial compression of eye offset, aligned axis, translucency by distance, color and pick color.
Update CHANGES.md
Add readonly to doc.
Merge pull request #2230 from AnalyticalGraphicsInc/bingCulture

Add parameter to BingMapsImageryProvider to allow changing the culture of the imagery.
Add missing readonly doc