create lab directory in parent

abstract MazeParams to be able to set them easily
doit.sh support new class creation
updated README

Signed-off-by: philippe lhardy <philippe@pavilionartlogiciel>

java/org/artisanlogiciel/games/MazeParams.java

@@ -0,0 +1,24 @@
+package org.artisanlogiciel.games;
+
+import java.io.File;
+
+/**
+ MazeParams was autogenerated by ./generate_newclass.sh
+ **/
+public interface MazeParams
+{
+    public int getWidth();
+    public int getHeight();
+    public int getMaxDepth();
+
+    /**
+       @return name of Maze, used for creating filename at saving time
+     */
+    public String getName();
+
+    /**
+       @return directory owning where to save a maze
+     */
+    public File getSaveDir();
+    
+}