Assets Romulan Warbird

This update adds the Romulan Gallant Cruiser to the fleet:
-- This model is more reminiscent of the Romulan starships as seen in the original series.
-- This ship comes equipped with a six-bank array of disrupter cannons, a plasma torpedo launcher, and a cloaking device.
-- A new demo scene has been added for a quick look at the new starship, "romulan gallant cruiser demo."
-- Also in this update, some minor sound logic bugs were corrected in the Romulan Warbird demo scene.