Implemented fog saving

core/src/io/anuke/mindustry/io/versions/Save16.java

@@ -135,6 +135,18 @@ public class Save16 extends SaveFileVersion{
             tiles[x][y] = tile;
         }
 
+        for(int i = 0; i < width * height; i++){
+            boolean discovered = stream.readBoolean();
+            int consecutives = stream.readUnsignedShort();
+            if(discovered){
+                for(int j = i + 1; j < i + 1 + consecutives; j++){
+                    int newx = j % width, newy = j / width;
+                    tiles[newx][newy].setVisibility((byte) 1);
+                }
+            }
+            i += consecutives;
+        }
+
         world.endMapLoad();
     }
 
@@ -223,5 +235,27 @@ public class Save16 extends SaveFileVersion{
                 i += consecutives;
             }
         }
+
+        //write visibility, length-run encoded
+        for(int i = 0; i < world.width() * world.height(); i++){
+            Tile tile = world.tile(i);
+            boolean discovered = tile.discovered();
+
+            int consecutives = 0;
+
+            for(int j = i + 1; j < world.width() * world.height() && consecutives < 32767*2-1; j++){
+                Tile nextTile = world.tile(j);
+
+                if(nextTile.discovered() != discovered){
+                    break;
+                }
+
+                consecutives++;
+            }
+
+            stream.writeBoolean(discovered);
+            stream.writeShort(consecutives);
+            i += consecutives;
+        }
     }
 }