Add new map "Abandoned City" by SG

abandoned_city/map.conf

@@ -0,0 +1,21 @@
+game_modes = return {"classes","classic"}
+barrier_area = return {pos1={x=0,y=0,z=0},pos2={x=146,y=160,z=216}}
+teams = local _={};_[1]="flag_pos";_[2]="enabled";return {red={pos2={x=0,y=160,z=108},pos1={x=146,y=0,z=216},[_[1]]={x=132,y=66,z=202},[_[2]]=true},blue={pos2={x=146,y=160,z=108},pos1={x=0,y=0,z=0},[_[1]]={x=14,y=66,z=14},[_[2]]=true}}
+chests = return {{amount=60,pos1={x=0,y=11,z=0},pos2={x=146,y=51,z=107}},{amount=60,pos1={x=0,y=11,z=109},pos2={x=146,y=51,z=216}}}
+phys_jump = 1
+phys_speed = 1
+size = return {x=146,y=160,z=216}
+map_version = 3
+enabled = true
+name = Abandoned City
+phys_gravity = 1
+initial_stuff = return {"default:pick_steel","ctf_ranged:pistol_loaded"}
+author = SG
+hint = Ores are hidden in certain buildings!
+license = CC BY-SA 4.0
+others = 
+treasures = 
+skybox = none
+enable_shadows = 0.26
+start_time = 5900
+time_speed = 1