New Trader Spaceship Variants - EA Update v0.4.0.30

As you can now expect more traders visiting your space station, i have added a few different spacecraft types. New graphics, different ship speeds and updated effects. Have also given ships an identity rather than just a number, which now shows up on the ships info window as well as the comms window so can track craft more easily.

Some improvements to the comms window (improved statuses, tooltips) and fixes. Full notes:-

• Randomise friendly ships (ship graphics, fx, and speed).
  
• Repair bots now have a different repair sfx.
  
• Navigation beacon requires an available docking spot to be enabled. Tooltip added.
  
• Improve: Repair tooltip show 'repair bay in use' as well as 'no repair bay'.
  
• Improve: More docking info in tutorial.
  
• Improve: Comms window - disable options on departing ships.
  
• Improve: Moving ships now always pass over docked ships.
  
• Fix: Comms/Droid window update list on opening.
  
• Fix: Ship/Miner destroy clear docks and repair bay fully.
  
• Fix: Item info window check ship selected instance exists.