1.0.0
- breaking change: based on polymer 1.0, please check https://www.polymer-project.org/1.0/docs/migration.html
- breaking change: camelCase attributes renamed to all lower case with hyphen (e.g. maxZoom renamed to max-zoom)
- added geojson support (thanks to Rob Beers)
- fixed marker.zIndexOffset (thanks to Jason Shortall)