v3.0.0
- Rename us/10m.json to counties-albers-10m.json.
- Rename us/states-10m.json to states-albers-10m.json.
- Add counties-10m.json.
- Add states-10m.json.
- Add nation-10m.json.
- Add nation-albers-10m.json.
- Scale the U.S. Albers projection to fit a 975×610 viewport.