Filter orders

[ddattee]

Resolve #17
Resolve #19

What does the PR do

Adding basic implemented order collection filter

How to test

Only orders for the requested filters should show

$criterias      = [
    'filters' => [
        'tag'            => 'tag',
        'channel'        => 123,
        'since'          => new DateTime('2017-12-01T12:00:00'),
        'until'          => new DateTime('2018-01-31T12:00:00'),
        'acknowledgment' => 'acknowledged'
        'carrier'        => 'UPS'
    ],
];
foreach ($orderDomain->getPage($criterias) as $order) {
    echo $order->getReference();
}

[ronan-gloo]

Petite modification sur le format de date