Config class

Creating the pull request so that I can comment some lines ;)
I think we should load this in a more regular way: at the top of the PHP file. I understand why it's hidden in the static method, but I don't think it's wise to do so. The `Autoloader` class is simply part of the base.php code.

It's like creating a class in a function in C++. It's possible to do so, but that's not a good practice anyway ;)