Make sure webkitCreateShadowRoot calls the polyfill createShadowRoot
Merge pull request #163 from arv/wrap-webkit-create-shadow-root

Make sure webkitCreateShadowRoot calls the polyfill createShadowRoot
adoptNode needs to adopt the shadow root too
Merge pull request #167 from arv/owner-document-of-shadow-root

adoptNode needs to adopt the shadow root too