Improve Atmosphere.getDensity() to a functional level
Simplify and implement getDensity()
Implement getTemperature() and improve Atmosphere.py
Move habitability to the model
Refactor get methods into one method
Add makeAtmosphere and getHabitable
Plurify atmosphere.py title and implement it in planets.py
Cleanup atmospheres.py
Change atm composition option to 'atmosphere'
Add weather to atmospheres
Cleanup atmospheres