Add implementation of Node.contains that jsdom is missing
Merge pull request #678 from mdlavin/add-node-contains

Add implementation of Node.contains that jsdom is missing
Removed old site generation code
Now for 0.10 engines
Switched tests from generators to async/await
CHANGED don't fire change event twice
update documentation for onconfirm to other words

I find the first draft very difficult to understand. Maybe this (and the examples) helps to clarify
Merge pull request #692 from pscheit/patch-2

update documentation for onconfirm to other words
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