Starship Corporation

- fixed quickload music error
- fixed "Spacebar is not working" error
- fixed Stairway Placement bug
- added version control for project files
- fixed build menu "lag" (you ended up with the wrong selection when you moved the mouse too fast)
- fixed error where rooms dissappeared when changing the deck too quickly
- improved deleting with the powertool
- fixed a Rollover/depth graphics error
- added Delete Button (keyboard) to remove rooms