Add new hangouts.google.com URL to excluded matches.
Add new hangouts.google.com URL to excluded matches.

Sometimes, but not all the time, I end up at hangouts.google.com instead
of plus.google.com. I think this is part of Google's move to decouple
Google Plus from the Hangouts service.

Resolves #81.

piccoloman/videospeed,piccoloman/videospeed