v0.9.0

• Much improved testing
• Much improved documentation
• Simplify rules around user-closing a viewport
• Fix bug where captured positional inputs were not casting the transformed location
• Deprecated Graph.get_root(). Use Graph.get!(graph, :root) instead.
• Renamed Primitive.put_opts to Primitive.merge_opts
• Deprecated Primitive.put_style(w/list). Use Primitive.merge_opts(...) instead.
• Deprecated Primitive.put_transform(w/list). Use Primitive.merge_opts(...) instead.
• Add Graph.find/2
• Add Graph.modify/3 with a finder function
• Rename Cache.request_notification/1 -> Cache.subscribe/1
• Rename Cache.stop_notification/1 -> Cache.unsubscribe/1
• General cleanup of Scenic.Cache.Hash. Some functions removed. Some function signatures changed.
• Add Scenic.version function. Returns current version of Scenic.