Added Google Cloud SDK to chef dependencies.

This will really help out with finishing story: https://www.pivotaltracker.com/story/show/68959006

Note: Installing gcloud with `curl https://sdk.cloud.google.com | bash` produced the error `/dev/tty: No such device or address` when run with chef. This is because of the `install < /dev/tty` line at the bottom of the script. The only way around this (that I've found) was to remove the < /dev/tty part from the file. This is why I've added the fixed file to the bin folder.

If anybody has an idea how to get around the tty issue in a cleaner way I'd be really glad to hear it.