Description:
------------
An equivalent to ReflectionMethod::invokeArgs() is missing for creating new instances of classes through the Reflection API where the class' constructor requires parameters.

I there propose ReflectionClass::newInstanceArgs($args) in addition to the existing ReflectionClass::newInstance() method.

Reproduce code:
---------------
<?php
class Sample
{
  public function __construct($a, $b)
  {
    print "$a, $b";
  }
}

$class  = new ReflectionClass('Sample');
$object = $class->newInstanceArgs(array(23, 42));
?>

Expected result:
----------------
23, 42