-Added astronauts. Survival pods.
-Window is now resizable.
-Start up options menu.
-Sound volume control.
-Keys defined by user.
-Help in game.
-Select and send ships with a mouse click.
-Added order RETREAT.
-Modified order STOP.
-EXPLORE reviewed. The ships dont explore out of
Universe limits anymore. Explore method depends on ship's level.
-Asteroids are no more visible everywhere.
-Several minor bugfixes.