apache/libcloud — pull request #399 by erjohnso (2014-11-24 20:09:22+00:00)
Title: [google compute] improved API coverage for Projects

This PR adds support for:
* Setting common instance metadata. Common instance (or project-wide) metadata is typically used for defining a `startup-script` and setting `sshKeys`.
* Setting a usage export bucket. The usage export feature allows storing compute engine resource usage to Google Cloud Storage.

For setting common instance metadata, there is a safety check (boolean flag) to that must be set to forcefully overwrite or remove `sshKeys`.