Added ExpandingIterator
Added IterationStep::createFromArray()
Added ForeachIterator Class B

Class Overview:

-  A: Wrapped with SPL existing
-  B: reset() / current() / key() / next() (/end() / prev())
-  C: generator (PHP 5.5)
Added DOM
Added InstanceOfFilter
Added DOMNodeListIterator
Added DOMXPathElementsIterator
Added DOMAttributeFilter
Added DOMAttributeValueFilter