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/CharProvider.java

@@ -0,0 +1,32 @@
+package org.artisanlogiciel.lua;
+
+public class CharProvider {
+
+    String input;
+    int current;
+
+    public CharProvider(String input) {
+        this.input = input;
+        current = 0;
+    }
+
+    public char getNextchar()
+    {
+        int i = current;
+        if ( input.length() > current) {
+            current++;
+            return input.charAt(i);
+        }
+        else
+        {
+            return 0;
+        }
+    }
+
+    public void pushBackChar(char c)
+    {
+        System.out.print('*');
+        current--;
+    }
+
+}