Adding a CloudStack deployment page with initial documentation and place...

This adds a page for CloudStack deployments documentation.

I am not sure how you would to handle this, but I check the coreOS page which lists several links.
The main idea is that there are many different ways to do this and I just want to have a basic place holders to add documentation.
I am happy to send a pr for https://github.com/runseb/kubernetes-exoscale but I will also start working on a pure vagrant setup to deploy on CloudStack and that could be linked from the cloudstack page in the getting started guides.