jackson databind import

- and some reowrk to use Position more than (x,y) parameters

java/org/artisanlogiciel/games/maze/Position.java

@@ -3,6 +3,9 @@ package org.artisanlogiciel.games.maze;
 /** position of a cell with maze */
 public class Position
 {
+    public final static Position stepX = new Position(1,0);
+    public final static Position stepY = new Position( 0,1);
+
     private int x, y;
 
     public Position(int x, int y)
@@ -38,6 +41,12 @@ public class Position
         return this;
     }
 
+    public Position doReverseTranslate(Position other) {
+        x -= other.x;
+        y -= other.y;
+        return this;
+    }
+
 
     public void limitToMax(int mx, int my)
     {
@@ -82,4 +91,8 @@ public class Position
             return false;
             }
     }
+
+    public boolean within(int a, int b, int width, int height) {
+        return ((x > a) && (x < width) && (y > b) && (y < height));
+    }
 }