Use property getters for readonly properties in Renderer
Starting to fix array documentation markup for issue #1434
Merge remote-tracking branch 'origin/master' into readonly-scene
More jsdoc fixes to our usage of Array.
More jsdoc Array fixes.
More jsdoc Array fixes.
Use property getters for readonly properties in Scene
Merge remote-tracking branch 'agi/master' into issue1434

Conflicts:
	Source/Core/GeometryAttribute.js
	Source/Core/GeometryInstanceAttribute.js
	Source/Core/PolylineGeometry.js
	Source/Core/SimplePolylineGeometry.js
	Source/Renderer/Context.js
	Source/Renderer/createShaderSource.js
	Source/Scene/Polygon.js
	Source/Scene/TextureAtlas.js
Fixes based on @mramato comments.
Merge pull request #1729 from abwood/issue1434

Issue1434
Merge branch 'master' into readonly-scene
Fix BlendingState
Remove CameraFlightPath.createAnimationCartographic.
Update CHANGES.md.
Merge pull request #1730 from AnalyticalGraphicsInc/removeCreateAnimationCartographic

Remove CameraFlightPath.createAnimationCartographic
Merge pull request #1728 from AnalyticalGraphicsInc/readonly-scene

Readonly property getters
Merge branch 'master' into referenceProperties