New developments for "Koso and Piggy - My pig is starving!"
Added wall barbed
Fix levels 57 and 60
Added first enemy ( Wolf ) with 3 states:
- guard ( still, moving only when Koso or Piggy are near, back in the starting cell)
- sentinel ( moves across the map )
- seeker ( looking Koso and Piggy )
If Wolf hits Koso, Koso loses energy.
If Wolf hits Piggy, Koso and Piggy die.
