Added FPS and Sound Controls and Fixed Several Bugs. — Next Stop: Zombie Steam update #829298

Added First Person Shooter and Sound Controls: This can be accessed thru the main menu when starting or when you press Escape or click on the Pause button. Then select the Controls button. Fixed Several Bugs: Fixed missing colliders that were making the player fall thru the floor. Made the zombies attack mode, when next to player, so that they don't appear to be sliding on the floor. Enabled mouse pointer in Controls menu so that you can see selections. Made bullets faster so they don't look as their floating before reaching target. Removed barrier on two of the train doors that was keeping the player from getting off the train. And Also: Increased resolution of some textures. Discount of 50% will start May 8th at 10 AM and will run for 6 days!