Fixing bugs and improving.

Signed-off-by: Taylor Otwell <taylorotwell@gmail.com>

laravel/database/eloquent/pivot.php

@@ -9,6 +9,13 @@ class Pivot extends Model {
 	 */
 	public $pivot_table;
 
+	/**
+	 * Indicates if the model has update and creation timestamps.
+	 *
+	 * @var bool
+	 */
+	public static $timestamps = true;
+
 	/**
 	 * Create a new pivot table instance.
 	 *