Add a document to walk you through setting up your own tilde.club
flavoured server.
Update how-to-set-up-a-tilde.md
Add a mention that other cloud providers would work just as well

/cc @pfhawkins
Fix chmod/chown permissions on `foo` user. I imagine this will
eventually be scripted anyway but it's always nice to see something up
and running quickly.
Make the `Security Groups` section more explicit
Merge pull request #14 from rey/master

Add a document to walk you through setting up your own tilde.club flavoured server.