support Google Billing information

[theRealWardo]

I like that this project seems to share examples for how to bring in AWS billing info, but we also run services on Google Cloud. It would be very useful to be able to have an integration with their billing system as well.

I worry that the billing data from Google is not as granular as the data that Amazon provides. There's a chance that labels could be added to give better insights, but I've got to dig in a bit more to figure out if it works.

A couple relevant links for the curious:

• https://cloud.google.com/billing/docs/how-to/export-data-file
• https://cloudplatform.googleblog.com/2015/10/using-labels-to-organize-Google-Cloud-Platform-resources.html - the comments on this blog post have me feeling all the data people will want is not going to be available

[chancez]

This is something we would definitely like to eventually support. From what I remember researching, google does export the data in a similar way to how amazon does, so wiring things up to have access to a GCS bucket should be similar.