ZF2-229: Add XHTML1 RDFA doctype to Zend\View\Helper\Doctype

Description

It would be nice if the feature ZF-10796 (http://framework.zend.com/issues/browse/ZF-10796) from zf1 could also be integrated into zf2.

Comments

Issued a pull request that contains the fix: https://github.com/zendframework/zf2/pull/961

Thank you. Much appreciated.

Also added the isRdfa method, and additional unit tests. Awaiting merge now.

Feature request was merged into master.

Thank you for your feedback.