Changed models to use the uri or path property as glTF currently uses path but the next version will use uri. We'll eventually change to just using uri.
Rename to member to animations
Update third-party Tween.js
Cleaned up Camera Sandcastle example
Minor CameraFlight clean up
Added flyTo and flyToRectangle to Camera
Merge master to animation-collection
Sandcastle camera ICRF example fix
Revert AnimationCollection.add return value for now
Merge branch 'master' into animation-collection

Conflicts:
	CHANGES.md
Merge pull request #1806 from AnalyticalGraphicsInc/animation-collection

Camera flights
Update thumbnail.
Fix ICRF example
Merge pull request #1808 from AnalyticalGraphicsInc/small-fix

Fix ICRF Sandcastle example
Merge remote-tracking branch 'tfili/master' into glTF-uri
Add glTF backwards compatibility comment
Merge pull request #1799 from tfili/glTF-uri

Changed models to use the uri or path property.
Merge remote-tracking branch 'origin/master' into refactor-julianDate