Plot course

This merge adds:
* three new planets
* thirteen new moons
* Planets and moons are now streaming from the server
* Client and server are now syncronizing over the server's system clock and julian date
* Simple UI added to facilitate course trajectories
* Trajectory REQUEST protocol
* Orbit rainbowing to add some interesting patterns
* Server simulation time is now three days per second
* Slowed the orbits of moons to be a half-revolution per second minimum