Description:
------------
I suggest adding a new function called __import() or __use() or something similar to autoload namespaces when they are used() but undefined.

Reproduce code:
---------------
core.php
<?php
function __import($sNamespace)
{
    // sample code to load namespace dynamically
    echo "Auto-Importing $sNamespace\n";
    require_once '/path/to/folder/' . join('/', explode('::', $sNamespace) . '.php';
}
?>

some_other_file.php
<?php
namespace MyNamespace;
use Library::DB::Connector;
use Library::Other::Stuff;
?>

Expected result:
----------------
Auto-Importing Library::DB::Connector
Auto-Importing Library::Other::Stuff