Add "The Wall" map by Thomas-S (#21)

wall.conf

@@ -0,0 +1,13 @@
+team.1.pos = (51,-15,51)
+team.1.color = red
+author = Thomas-S
+rotation = x
+name = The Wall
+hint = Look for a treasure room inside the wall!
+r = 110
+initial_stuff = default:pick_wood,default:sword_wood,default:stick 5,default:torch 3
+team.2 = blue
+h = 50
+team.2.color = blue
+team.2.pos = (-51,-15,-51)
+team.1 = red