WIP minetest <-> laby import/export

- currently possible to export a laby into minetest
- start of a lua content parser to import .we into lab

java/org/artisanlogiciel/lua/LuaNumber.java

@@ -0,0 +1,17 @@
+package org.artisanlogiciel.lua;
+
+public class LuaNumber
+extends LuaObject {
+
+    int number;
+
+    LuaNumber(int number)
+    {
+        this.number = number;
+    }
+
+    @Override
+    public String toString() {
+        return "" + number ;
+    }
+}