Lots of improvements

- Reorganize
- Quiet output, remove requirement on bar
- Improve error handling
- Check that the script is running as root
- Allow tweaking newfs options
- Bake in google-cloud-sdk since it is needed by some of the other tools that are baked in
Remove requirement to have gcloud sdk installed

A user may want to build on one box and upload on another, so give the user
some flexibility, remove the requirement to have gcloud sdk installed and
automatically installing it if it's not.