Fixed up the map generator so that it's placing entities in non-overlapping tiles and adapting the style for the size. It can also deal with maps that have no rooms better and places the stairs better.

maze.cpp

@@ -95,16 +95,12 @@ namespace maze {
   }
 
   void Builder::randomize_rooms() {
-    dbc::check($dead_ends.size() >= 2, "must have at least two possible points to place rooms");
-
-    while($rooms.size() < 2) {
-      // use those dead ends to randomly place rooms
-      for(auto at : $dead_ends) {
-        if(Random::uniform(0,1)) {
-          size_t offset = Random::uniform(0,1);
-          Room cur{at.x+offset, at.y+offset, 1, 1};
-          $rooms.push_back(cur);
-        }
+    // use those dead ends to randomly place rooms
+    for(auto at : $dead_ends) {
+      if(Random::uniform(0,1)) {
+        size_t offset = Random::uniform(0,1);
+        Room cur{at.x+offset, at.y+offset, 1, 1};
+        $rooms.push_back(cur);
       }
     }
   }