[RPS-19] Deploy Hippo Delivery stack

To start/update Hippo Delivery stack simply run
```
make stack ROLE=hippo_delivery
```

[RPS-18] Create Hippo stack

New stacks added to startup Mysql RDS, Autoscaling Group, Load Balancer
etc.

To start up "hippo_authoring" all you need to run is:

```
make stack ROLE=hippo_authoring
```

Provide Ansible folder layout and setup

Ansible is installed locally using virtualenv, be default in
`ansible/.vevn/bin/`. Conifg is in `ansible/ansible.cfg`.

You can pre-install it by running `make init`, or it will be installed
automatically by any target that requires it.

You should alwyas use Ansible via existing Makefile targets like
`make stack ROLE=hippocms` or add new target for your usecase.