Orbital Survey Plus

- The orbital surveyor now sports a "Toggle Biome Overlay" button for viewing a planet's biomes
- A toolbar button has been added to allow the biome overlay to be toggled without the orbital surveyor
- The biome overlay feature requires that the planet be surveyed first
- Option added in settings.cfg for allowing the biome overlay without having to scan first
- Option added in settings.cfg for disabling "extended surveyor", reverting surveyor back to stock functionality (in case you just want the biome overlay feature)
- An in-game settings menu has been added (via a toolbar button at the space center scene), which mirrors and updates the settings.cfg file
- A settings.cfg file will be generated automatically if none is found