now compute if a fighter can attack or not
add a constructor to change MapActor without return to first Terrain. Now stay at the screen like the player have set
upgrade the menu: now differenciate the teams (don't show "attack" and others when the selected fighter is an ennemy), and reload there at each moving
enable listeners when we change MapActors
draw the battle stats on the map when you click on the ennemy
add a texture for the battle stats