[NFR] Allow Phalcon\Mvc\Url::get() to append query params

[ghost]

See #723

The only difference is that query parameters are passed as the optional second argument (can be either an array or object).

[ghost]

Rebased against the latest HEAD

[jeffreycahyono]

Usage example pls?

[ghost]

$url = new Phalcon\Mvc\Url();
echo $url->get('', array('a' => 1, 'b' => array(2, 3, 4, 5))), "\n";

will produce /?a=1&b%5B0%5D=2&b%5B1%5D=3&b%5B2%5D=4&b%5B3%5D=5

$url = new Phalcon\Mvc\Url();
echo $url->get('test?x=1', array('a' => 1, 'b' => array(2, 3, 4, 5))), "\n";

will produce /test?x=1&a=1&b%5B0%5D=2&b%5B1%5D=3&b%5B2%5D=4&b%5B3%5D=5.