Cesium 1.22

1.22 - 2016-06-01

Highlights include:

• Added heightReference to models so they can be drawn on terrain.
• Added support for rendering models in 2D and Columbus view.
• Added option to enable sun position based atmosphere color when Globe.enableLighting is true. 3439
• Improved KML NetworkLink compatibility by supporting the Url tag. #3895.

See the change log for a full list of changes