Improvement: $_POST and $_SESSION dumps

[sboudoux]

Hi,

I'm using your toolbar for my phalcon project, it's really nice. It would be even better if it were displaying Post and Session variables too. It's mor eimpoprtant to me than the Server array.

Generally speaking, if we could "register" new variables or tabs, your tool would become awesome.
Thinking about:

$debugWidget->registerTab('_Post', $_POST);
$debugWidget->registerVar('myDebugVar', $MyVar);