13-Jul-03 FIX: fixed a bug in AI code that could crash the game if the
               AI was searching for suitable places to build a station
               near the map border

          CHANGE: private cars speed risen to 60 km/h

12-Jul-03 CHANGE: enlarged text buffer for convoi info window from 16k
                  to 32k

          CHANGE: lowered passenger generation at tourist attractions by
                  20%

	  CHANGE: included Tomas Kubes' sawmill in 64x64 image set

          NEW: added emergency button to vehicle info window - it removes 
               the vehicle from the map. This is useful to get rid of
               stuck vehicles. Be careful: the removed vehicle is gone
               forever! The button is labeled "X".
            
	  NEW: AI will now remove vehicles if they have no suitable
               route (anymore) - i.e. due to a bug or player sabotage.