0.51.0 - Call for Help

With this update I added a new ship for both demo and beta versions of the game and expanded storyline. Full changelog:

• Added Machines Astro-Dynamiques Cerunnos Modèle II (aka "CERF") ring rescue ship.
• AI can now find broken ships, pilot a rescue ship to them and drive them out of the rings safely.
• When you end up helpless in the ring (with no power, propellant or critically damaged ship), an AI ship will show up to pick you up and tow you to safety.
• You now have a chance to encounter rescue operation within the Ring.
• Lifepods are now equipped with emergency radio beacon.
• AI Pirates can now use lifepods to lure victims into traps.
• You will now automatically sell anomalies that have no other function upon returning to Enceladus Prime station.