v0.3.1: added a sort of tutorial for the new double-tap to search functionality, and searchign in general

src/com/shatteredpixel/shatteredpixeldungeon/levels/SewerLevel.java

@@ -95,6 +95,13 @@ public class SewerLevel extends RegularLevel {
 				}
 			}
 		}
+
+		//hides all doors in the entrance room on floor 2, teaches the player to search.
+		if (Dungeon.depth == 2)
+			for (Room r : roomEntrance.connected.keySet()){
+				Room.Door d = roomEntrance.connected.get(r);
+				map[d.x + d.y * WIDTH] = Terrain.SECRET_DOOR;
+			}
 		
 		placeSign();
 	}

src/com/shatteredpixel/shatteredpixeldungeon/levels/features/Sign.java

@@ -44,8 +44,9 @@ public class Sign {
 				"Items found in the dungeon will often be unidentified. Some items will have unknown effects, others " +
 				"may be upgraded, or degraded and cursed! Unidentified items are unpredictable, so be careful!",
 		"Charging forward recklessly is a great way to get killed.\n\n" +
-				"Slowing down a bit to examine enemies and use the environment and items to your advantage can make a" +
-				" big difference.\n\nThe dungeon is full of traps and hidden passageways as well, keep your eyes open!",
+				"Slowing down a bit to examine enemies and use the environment and items to your advantage can make a " +
+				"big difference.\n\nThe dungeon is full of traps and hidden passageways as well, keep your eyes open.\n\n " +
+				"You can double tap on the examine button to search the area for secrets.",
 		"Levelling up is important!\n\nBeing about the same level as the floor you are on is a good idea. " +
 				"Hunger may keep you moving in search of more food, but don't be afraid to slow down a little and train." +
 				"\n\n\nHunger and health are both resources, and using them well can mean starving yourself in order" +