Update 0.5.58 #23

Added
- The Bear of Ślęża - Statue of Life (stone) - emits an aura that heals nearby units
- another available achievement to unlock

Improved
- range of unit experience points (larger)
- increased strength of the regular trap
- creating a small wooden trap
- appearance of fog
- rat movement
- mine price
- vampire strength - lower
- vampire punch animation
- double click on the building
- speed of movement on the terrain