Scenes Serenity

This update adds an external view model of the Firefly ship and an associated scene "Firefly Approach." Different versions of the ship are available, one version does not have wing engines loaded, and the left and right engines are also separated as individual objects. In the scene Firefly Approach, I have rigged the ship so that the engines stay attached to the ship, yet these parts of the ship can be rotated. I have added animation patterns and @everlaster randomizer to make subtle random movements. The movements are activated by clicking the "sway" button in the rear view of the scene near the web panel. Selecting the "off" button will stop the ship movement and put it back in its neutral position. This update also adds a "Firefly 1" subscene to make it easier to add the ship and the rigging to new scenes. If any issues or questions on how to adjust the movements, please ask in the discussion area.