Release 0.3.0

Features:
- Add travis testing
- Add `haproxy::basancermember` `define_cookies` parameter
- Add array support to `haproxy::listen` `ipaddress` parameter

Bugfixes:
- Documentation
- Listen -> Balancermember dependency
- Config line ordering
- Whitespace
- Add template lines for `haproxy::listen` `mode` parameter