Fix bug in ANBU that cause wrong total time showing on Queries tab

When query time is larger than one second 'array_sum' cannot convert it
to float right. Also, it is better to fire 'laravel.query' event with
raw time as an argument rather than its string representation

laravel/database/connection.php

@@ -308,7 +308,7 @@ class Connection {
 	 */
 	protected function log($sql, $bindings, $start)
 	{
-		$time = number_format((microtime(true) - $start) * 1000, 2);
+		$time = (microtime(true) - $start) * 1000;
 
 		Event::fire('laravel.query', array($sql, $bindings, $time));