Create vzctl.py

Small module to interact with vzctl and vzlist.
Update modules/vzctl.py
Formatting change.

- Changed tabs to 4 spaces.
- Brought code better in line with Salt coding style.
Renamed list function to vzlist.
Merge pull request #27 from Daemonthread/master

vzctl module
Adding states for keystone
Merge pull request #28 from jaustinpage/keystone-states

Adding states for keystone