Fix sun size.
Merge branch 'master' into sunSize
Merge remote-tracking branch 'origin/master' into sunSize
Add a sunburst.
Get rid of sin() and cos() from sun shader.
Added get/setGlowFactor to address a feature request in #769.
Merge pull request #1081 from AnalyticalGraphicsInc/sunburst

Sunburst
Fix whitespace.
More whitespace.
Use Object.defineProperty for glowFactor.
Switch to Core/defineProperties.
Merge branch 'master' into sunSize
Modify projectTo2D to take attribute names.
Assume that any attributes whose component data type is double needs to be projected to 2D and split for RTE.
Add PolylineGeometry.
Add polyline color and material appearances.
Generate compute functions based on scene mode for polyline position and adjacent positions.
Modify PolylineCollection to use common polyline shader code.
Create polyline geometry on a web worker.
Add polyline geometry to Sandcastle example.