* Try to optimize the set terrain tool by adding Map::set_height for areas. That means first set the height of every node in the area, then adjust the surrounding nodes ([http://sourceforge.net/tracker/index.php?func=detail&aid=1640305&group_id=40163&atid=427221], "Editor set height tool set to max produces funny mountain" is still present though). * Use Area and Player_Area. * Put most of the code from Event_Conquer_Area and Event_Unhide_Area into a common base. * Initialize the names of events and triggers in their initializer lists.