fog/fog — pull request #2733 by brettporter (2014-03-05 09:50:23+00:00)
Title: ability to supply serviceAccounts on image create

Takes an array of service accounts, with an email and scopes to add to an
instance on creation.

This will take the form:
```
:service_accounts => [
:email => "123845678986@project.gserviceaccount.com",
:scopes => [
'https://www.googleapis.com/auth/devstorage.read_write'
]
]
```

For more information: https://developers.google.com/compute/docs/authentication#using, or the documentation at: https://developers.google.com/compute/docs/reference/latest/instances