Add java.util.random seed as initial parameter

- prepare for short save allowing to fully recreate initial lab
having only seed and x,y,depth paramters

java/org/artisanlogiciel/games/MazeParamEditor.java

@@ -8,6 +8,7 @@ import java.util.Scanner;
  **/
 class MazeParamEditor implements MazeParams
 {
+    long seed;
     int width;
     int height;
     int maxdepth;
@@ -27,6 +28,11 @@ class MazeParamEditor implements MazeParams
 	maxdepth = console.nextInt();
     }
 
+    public long getSeed()
+    {
+        return seed;
+    }
+
     public int getWidth()
     {
 	return width;
@@ -51,6 +57,11 @@ class MazeParamEditor implements MazeParams
 	return name;
     }
 
+    public void setSeed(long seed)
+    {
+        this.seed = seed;
+    }
+
     public File getSaveDir()
     {
 	return labdir;