Updated jsdom to 0.11.1

This is an alternative to #742 updating jsdom only to 0.11.1 rather than 1.0.0-pre.5. The BC breaks in 1.0 are making the tests fail in many places, and I don't know zombie enough to be able to fix them.
Updating to 0.11.1 will give us some of the JSDom bug fixes. But it would be great that someone with more knowledge than me could try to upgrade to the 1.x API of JSDom to avoid staying locked on an old version