0.2.11 -added confirmation dialog
-implemented confirmation dialog for dropping items via circle menus in
dungeon inventory
-started ai framework
-added some basic thinking about melee combat and running away to
ai_stupid_melee
0.2.12 -added real pathfinding
-made pathfinding respect other actors and objects
-runtime optimization for pathfinding
-started ranged ai
0.2.13 -further pathfinding optimization in preperation to using the same algorithm
for multitile dungeon movement (test case in DEBUG mode on large battlefield
44ms -> 32ms)
-ranged ai
-pathfinding for ranged combat
-fixed bug in battlefield los check
-fixed bug when wrong or no ammo is equipped for ranged combat
-added multitile dungeon movement
