HL deployment work

Summary:
Ansible can be used to deploy HL now.

```
ansible-playbook --private-key ~/.ssh/haskell_id_rsa -i ../inventory deploy-website.yml --extra-vars='target=new-www.haskell.org'
```

should get you pretty close, if you adjust the paths to be correct.

Test Plan: I've been using it all day. :)

Reviewers: austin

Reviewed By: austin

Subscribers: relrod

Differential Revision: https://phabricator.haskell.org/D51