Powercraze 1.0

First ever stable version of the game!

- New sounds (Powerup pickup sound)

- New powerups:
       - Good:
               - DummyPlayer: Swaps the opponent's player controls
               - StalkerBall: Disk follows player
       - Neural:
               - Duplicate (Duplicates the disk)
               - SlowBall (Decreases the ball speed)
               - SpeedBall (Increases the ball speed)
               - SlowMo (Slow-motion effect)

- Other functionalities:
         - When the player/disk already has that powerup, it increases the duration by 5 seconds.