user can't delete self and flash_messages

public/stylesheets/main.css

@@ -9,4 +9,16 @@ ul.list li{
 	padding:.5em 0;
 	list-style:none;
 	border-bottom:1px solid #ccc;
-	}
+	}
+	
+.error{
+  color:red;
+  }
+	
+.notice, .message{
+  color:green;
+  }
+  
+.warning{
+  color:orange;
+  }