Added pip_wrapper.

This is similar to what we did for appscale to ensure we are more
persistent in installing python packages. Removed expect since it was not
used.
Remove explicit install to ssh-copy-id.
Exit if pip_wrapper is called with no arguments.
fixed project description for gce
Merge pull request #392 from nlake44/note-update

fixed project description for gce
Merge pull request #391 from obino/pip-wrapper

Pip wrapper