add sleeping functionality to Tent object and update player image handling

src/de/miaurizius/jgame2d/entity/item/TentObj.java

@@ -25,6 +25,7 @@ public class TentObj extends Entity {
         panel.playSE(14);
         panel.player.life = panel.player.maxLife;
         panel.player.mana = panel.player.maxMana;
+        panel.player.getSleepingImage(down1);
         return true;
     }
 }