Features:
  - Added 9 small ruins.
  - Added 9 medium ruins.
  - Added 5 large ruins.

Changes:
  - Reduced the amount of power poles in ruins.
  - Removed 4 small ruins that were broken.
  - Updated russian translation (by Shadow_Man).
  - Decreased default spawn changes of small ruins to 4% (from 5%).

Bugfixes:
  - Fixed that oil pumpjack ruins would spawn oil patches.