v0.4.4

Added

• load-error events when model, tile set, and API token requests fail to fetch or parse.
• CanvasDOMOverlay: Add support for "ref".
• CameraTransitionManager: Add easeFunction setting.
• CameraTransitionManager: Add option to pass delta time to the update function.

Fixed

• Improved the behavior of loadProgress so it "bounces" less during loading by queueing all tiles load immediately (other than cases with external tile sets).
• Moved the dispatch location of "load-model", "tiles-load-start", and "tiles-load-end" so the behavior is more consistent.