Description:
------------
New flag to ArrayObject: DEEP_CONVERSION.

This flag would make ArrayObject inspect the array $input indexes for others 
arrays and also instantiate an ArrayObject with the index array also with the same 
$flags and the same $iterator_class.

Test script:
---------------
<?php

$Array = array();

$Array['string'] = 'string';

$Array['array'] = array();
$Array['array'][] = 'string';
$Array['array'][] = 'string';
$Array['array'][] = 'string';

$Array['matrix'] = array();

$Array['matrix']['string1'] = 'string';
$Array['matrix']['string2'] = 'string';
$Array['matrix'][]          = 'string';
$Array['matrix'][]          = 'string';
$Array['matrix']['array1']  = array();
$Array['matrix']['array1'][]         = 'string';
$Array['matrix']['array1'][]         = $Array['array'];
$Array['matrix']['array1'][]         = 'string';
$Array['matrix']['array1']['string'] = 'string';
$Array['matrix']['array2']  = array();
$Array['matrix']['matrix']  = array();
$Array['matrix']['matrix']['array'] = $Array['matrix']['array1'];
$Array['matrix']['matrix'][]        = $Array['matrix']['matrix']['array'];
$Array['matrix']['string3'] = 'string';
$Array['matrix'][] = null;

$Array = new ArrayObject($Array, ArrayObject::ARRAY_AS_PROPS);

echo $Array->matrix->matrix[0][1][0];

?>

Expected result:
----------------
string

Actual result:
--------------
(!) Notice: Trying to get property of non-object in D:\WWW\sandbox.php on line 32