#87 powerups

Added 4 power ups:
  BombPlusOnePowerup: Adds a bomb to the players max number of bombs
  BombRangePowerup: Increase the range of a players bombs by 1
  FlamePassPowerup: Grants the player immunity to bomb detonations
  MysteryPowerup: Grants the player temporary invulnerability

Players pick up powerups by moving on top of them