prepare for hexagon display & other models

- display cell as hexagon is Display.mHexagon if set ( not default )
will need a checkbox to set this
- various new models preparation...

java/org/artisanlogiciel/games/maze/LabyMap.java

@@ -111,7 +111,7 @@ public class LabyMap implements WallsProvider
         {
             for (int x = 0; x < tileMap.length; x++)
             {
-                laby += "" + BrickTextMapping.getChar(tileMap[x][y]);
+                laby += "" + BrickTextMapping.getDefaultChar(tileMap[x][y]);
             }
             laby += "\n";
         }