Separated langpack, concept art for inventory UI

Former-commit-id: 7a98df93b4ef50b47283abcd99576d6fbefc9cc5
Former-commit-id: db6e34417ccf84e59ba68547f30459cb4b188eb7

src/net/torvald/terrarum/console/GetLocale.kt

@@ -10,9 +10,9 @@ class GetLocale : ConsoleCommand {
     override fun execute(args: Array<String>) {
         Echo().execute(
                 "Locale: "
-                + Lang.get("LANGUAGE_THIS")
+                + Lang["MENU_LANGUAGE_THIS"]
                 + " ("
-                + Lang.get("LANGUAGE_EN")
+                + Lang["MENU_LANGUAGE_THIS_EN"]
                 + ")")
     }