Add Chrome notifications to hangouts

Open source Extension which adds Chrome notifications to Hangouts tabs.

It supports multiple hangouts instances at the same time (for example if you're using both Gmail and Inbox).

Notifies you when:
- A contact becomes online
- There's a new chat message

Remember! You need to keep your gmail, inbox or hangouts tab open for the extension to work. I am not affiliated with Google in any way, so it's the best that I can do :)"