Zips with go instead of bash

Also these tests needed to be run as an administrator
Assert that 'cf stop' exits with a status code zero

It might not say "OK" if the app was already stopped.
Use login flags

Useful for running CATS against bosh-lite deployments
Update README.md
Use Godeps instead of GoCart for dependency managment

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>
Merge branch 'pull/10'

Signed-off-by: Kai Zhang <kaizhang@cn.ibm.com>