Tests Email and struct-dom-14-f.svg

I certainly didn't mean to send that email about the test suite so widely (got lost between public=private and vice-versa).

Either way, I think we need to fix these.  I am having my test team look into some proposals.

On another note, we caught a test:

struct-dom-14-f.svg

That was in error.

The spec says nothing about equality of elementInstances 

            if (instanceroot.firstChild.correspondingElement !== instanceroot.childNodes.item(0).correspondingElement)
              throw("failed");

But is clear about correspondingElement; so I presume this is what this test should be testing; I made the change below:

            if (instanceroot.firstChild!== instanceroot.childNodes.item(0)
              throw("failed");