Add cellular automata

src/map_builders/bsp/mod.rs

@@ -19,4 +19,4 @@ pub fn draw_corridor(map: &mut Map, x1: i32, y1: i32, x2: i32, y2: i32) {
         let idx = map.xy_idx(x, y);
         map.tiles[idx] = TileType::Floor;
     }
-}
+}