Add steam locomotive to miniature railroad location

data/json/mapgen/miniature_railway/miniature_railway_z1.json

@@ -61,6 +61,10 @@
       "place_monsters": [
         { "monster": "GROUP_SCHOOL", "x": [ 35, 40 ], "y": [ 10, 15 ], "repeat": [ 0, 1 ], "density": 1 },
         { "monster": "GROUP_SCHOOL", "x": [ 35, 40 ], "y": [ 35, 40 ], "repeat": [ 0, 1 ], "density": 1 }
+      ],
+      "place_vehicles": [
+        { "vehicle": "miniature_train_loco", "x": 5, "y": 31, "chance": 5, "fuel": 20, "status": 25, "rotation": 270 },
+        { "vehicle": "miniature_train_loco", "x": 41, "y": 41, "chance": 5, "fuel": 5, "status": 15, "rotation": 270 }
       ]
     }
   }

data/json/vehicles/trains.json

@@ -238,5 +238,16 @@
       { "x": 1, "y": 0, "parts": [ "headlight", "battery_motorbike" ] },
       { "x": -1, "y": 0, "parts": [ "muffler", "box" ] }
     ]
+  },
+  {
+    "id": "miniature_train_loco",
+    "type": "vehicle",
+    "name": "Miniature train locomotive",
+    "blueprint": [ "oo" ],
+    "parts": [
+      { "x": 1, "y": 0, "parts": [ "frame_vertical_2", "engine_steam_small", "rail_wheel_small_pair", "headlight" ] },
+      { "x": 0, "y": 0, "parts": [ "frame_vertical_2", "seat", "rail_wheel_small_pair", "controls" ] },
+      { "x": 0, "y": 0, "parts": [ { "part": "fuel_bunker", "fuel": "coal_lump" } ] }
+    ]
   }
 ]