Add weight option

[folliked]

Usage:

<?php

$factory = new MenuFactory();

$menu = $factory->createItem('My menu');
$menu->addChild('Home', array('uri' => '/', 'weight' => 10));
$menu->addChild('Comments', array('uri' => '#comments'));
$menu->addChild('Symfony2', array('uri' => 'http://symfony-reloaded.org/'));
$menu->addChild('Coming soon', array('weight' => 20));

$renderer = new ListRenderer(new \Knp\Menu\Matcher\Matcher());
echo $renderer->render($menu);

Final sort will be: Coming soon, Home, Comments, Symfony2, (as the default weight is 0)

[stof]

you are killing the purpose of the test here.

[Nek-]

With the sort on addChild, this test become impossible because prophecy use exceptions and php don't support it while sorting (it throw a warning and make tests fail).

https://bugs.php.net/bug.php?id=50688

[stof]

but the test is now useless. So this is the wrong way to fix the test.

[dbu]

are #207 and this one different attempts to solve the same issue?

[garak]

I guess we can close this for the same reason we closed #207