export many layers

- remark : wrong merge code ( dverged on two latptops .. ) possible loss

java/org/artisanlogiciel/games/minetest/Range.java

@@ -1,7 +1,13 @@
 package org.artisanlogiciel.games.minetest;
 
+/**
+ * [min,max] range with bounds included.
+ */
 public class Range {
+
+    // included
     int min;
+    // included
     int max;
 
     public int getMin() {
@@ -19,6 +25,12 @@ public class Range {
         max = -1;
     }
 
+    public Range(int pMin, int pMax)
+    {
+        min = pMin;
+        max = pMax;
+    }
+
     public boolean isEmpty()
     {
         return ( min > max );