Add tofs, use pre-salted images

# [0.3.0](https://github.com/saltstack-formulas/ufw-formula/compare/v0.2.0...v0.3.0) (2019-05-14)

### Continuous Integration

* **kitchen:** rename Kitchen config file ([2e59df4](https://github.com/saltstack-formulas/ufw-formula/commit/2e59df4))

### Features

* **semantic-release:** implement an automated changelog ([f25b404](https://github.com/saltstack-formulas/ufw-formula/commit/f25b404))

feat(semantic-release): implement an automated changelog

Allow multiple configurations for the same port

Also perform tests on bionic/18.04

Adds ability to limit or deny services and applications.

The "limit" and "deny" parameters have been added to both the services and
applications sections. Setting "limit: True" will use the "ufw limit" command
instead of "ufw allow". Likewise, setting "deny: True" will use the "ufw deny"
command.

Interface support