Try more registry values for windows.

Here's one option for fixing the registry issue. I added a dependency on underscore for [`_.after`](http://underscorejs.org/#after). If it gets as many errors as there are keyPaths to check, then it fails as it should. If you would prefer to not have the dependency, I can write an implementation of `after` locally. Double check that there aren't any new bugs introduced here, race condition maybe?

If you'd prefer something else, or any changes to the code, let me know.

Fixes #4.