add Save Text support and rework package

- move maze within package maze

java/org/artisanlogiciel/games/maze/MazeParams.java

@@ -0,0 +1,29 @@
+package org.artisanlogiciel.games.maze;
+
+import java.io.File;
+
+/**
+ * MazeParams contains parameters for a Maze generation
+ **/
+public interface MazeParams
+{
+    /** currently seed of java.util.random **/
+    public long getSeed();
+
+    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();
+
+}