Add Lua function Space.SpawnShipLanded (#1378).
Remove commented code line.
Lua function Station.GetGroundPosition.
Lua function Body.GetGroundPosition
Generate random point in circle/ring.
Add Lua function Space.SpawnShipLandedNear.
Pass the body docked with or landed on in the onCargoUnload callback (fixes #2360).
Explicitly check for LANDED state when unloading cargo.
Merge remote-tracking branch 'lwho/fix2360'
Revert the projectile speed changes done in #1607

- they collide more reliably
- they are more visible
Merge remote-tracking branch 'lwho/SpawnShipLanded'