Allow mods to add maps

core/src/io/anuke/mindustry/Vars.java

@@ -130,7 +130,7 @@ public class Vars implements Loadable{
     /** list of all locales that can be switched to */
     public static Locale[] locales;
 
-    public static FileTree filet;
+    public static FileTree tree;
     public static Net net;
     public static ContentLoader content;
     public static GameState state;
@@ -194,7 +194,7 @@ public class Vars implements Loadable{
 
         Version.init();
 
-        filet = new FileTree();
+        tree = new FileTree();
         if(mods == null){
             mods = new Mods();
         }

core/src/io/anuke/mindustry/maps/Maps.java

@@ -70,7 +70,7 @@ public class Maps{
      * Does not add this map to the map list.
      */
     public Map loadInternalMap(String name){
-        FileHandle file = Core.files.internal("maps/" + name + "." + mapExtension);
+        FileHandle file = tree.get("maps/" + name + "." + mapExtension);
 
         try{
             return MapIO.createMap(file, false);

core/src/io/anuke/mindustry/mod/Mods.java

@@ -154,7 +154,7 @@ public class Mods implements Loadable{
                 //ignore special folders like bundles or sprites
                 if(file.isDirectory() && !specialFolders.contains(file.name())){
                     //TODO calling child/parent on these files will give you gibberish; create wrapper class.
-                    file.walk(f -> filet.addFile(f));
+                    file.walk(f -> tree.addFile(f));
                 }
             }