Minor cleanup for IE and MutiationObserver
Merge pull request #140 from arv/ie-mutation-observer

Minor cleanup for IE and MutiationObserver
MutationObserver for IE. Second try.

This time the MutationObserver polyfill is added after the shadow dom polyfill
and the mutation observer only works with wrapped nodes. It still needs to be
aware of the wrappers since observe can be called with non wrapped nodes.
Merge pull request #142 from arv/more-mutation-observer-ie

MutationObserver for IE. Second try.
Removing syntax highlight for docs