Installing Cloud SDK which includes gcutil and gsutil. We still don't
have a package for it so laying out the tarball for now.

Change-Id: If66f0f1c074e6077e1ca57375cac9c4832bbd7fc
Merge pull request #131 from jkaplowitz/cloudsdk

Install Cloud SDK, which includes gcutil and gsutil.
Reinstate hostname hook for GCE

This DHCP exit hook to shorten the system hostname on GCE was previously
installed by build-debian-cloud and bootstrap-vz, but seems to have been
inadvertently removed in commit c81045cc6e0f6a2c90002ab50219a15c337630f1
as part of a broad cross-cloud cleanup. Again, this was caught by our
validation tests, and we might be done with the fixes at this point.

In this commit, I'm reinstating the hook with a name change and an
explanatory comment, to reduce the risk of this vanishing accidentally
in the future.

Change-Id: I4e7268f8b9ab3b2a7fc8b510898c6fbdd685aa53
Merge pull request #134 from jkaplowitz/hostname-fix

Reinstate hostname hook for GCE
Disable SSH password auth on GCE

This change was unintentional but occurred as part of GCE's transition
from build-debian-cloud to bootstrap-vz.

Might be replaced later with a similar change that applies to all
bootstrap-vz providers, based on the opinion of the debian-cloud list.

Change-Id: I72a694c49f32df06252d9cc01b1d5c7cfc015347
Removed a check to verify file type

The file command is not installed by bootstrap-vz by default.

Change-Id: I59d5f04145b7db517c28bfec1d4d758be468b398
Merge pull request #138 from jkaplowitz/development

Fix two issues that were uncovered by GCE's 20140807 image
Add minimize_size with zerofree to reduce vmdk size with minimal dependency

This should improve the size of base images for vagrant box download by end users.
Worth adding that to example manifest as should be a much needed improvement in most situations.