Implement missing OfflinePlayer methods

Essentials/src/com/earth2me/essentials/OfflinePlayer.java

@@ -787,6 +787,21 @@ public class OfflinePlayer implements Player {
     public void setBedSpawnLocation(Location lctn, boolean force) {
     }
 
+    @Override
+    public boolean sleep(Location location, boolean force) {
+        return false;
+    }
+
+    @Override
+    public void wakeup(boolean setSpawnLocation) {
+
+    }
+
+    @Override
+    public Location getBedLocation() {
+        return null;
+    }
+
     @Override
     public void playEffect(EntityEffect ee) {
     }