Added new touch function to eloquent, updates timestamps and immediately saves

Signed-off-by: Callum McIntyre <mcintyre1994@gmail.com>

laravel/database/eloquent/model.php

@@ -452,6 +452,16 @@ public function timestamp()
 		if ( ! $this->exists) $this->created_at = $this->updated_at;
 	}
 
+	/**
+	 *Updates the timestamp on the model and immediately saves it.
+	 *
+	 * @return void
+	 */
+	public function touch(){
+		$this->timestamp();
+		$this->save();
+	}
+
 	/**
 	 * Get a new fluent query builder instance for the model.
 	 *