New puzzle: `Map'. Vaguely original, for a change.

(This puzzle is theoretically printable, but I haven't added it in
print.py since there's rather a lot of painful processing required
to get from the game ID to the puzzle's visual appearance. It
probably won't become printable unless I get round to implementing a
more integrated printing architecture.)

[originally from svn r6186]

list.c

@@ -24,6 +24,7 @@ extern const game fifteen;
 extern const game flip;
 extern const game guess;
 extern const game lightup;
+extern const game map;
 extern const game mines;
 extern const game net;
 extern const game netslide;
@@ -45,6 +46,7 @@ const game *gamelist[] = {
     &flip,
     &guess,
     &lightup,
+    &map,
     &mines,
     &net,
     &netslide,