Add last_query() helper method to Database class, too.

Signed-off-by: Franz Liedke <franz@develophp.org>

laravel/database.php

@@ -134,6 +134,18 @@ class Database {
 		return Database\Connection::$queries;
 	}
 	
+	/**
+	 * Get the last query that was executed.
+	 *
+	 * Returns false if no queries have been executed yet.
+	 *
+	 * @return string
+	 */
+	public static function last_query()
+	{
+		return Database\Connection::last_query();
+	}
+
 	/**
 	 * Register a database connector and grammars.
 	 *