Revert "Change default host to 0.0.0.0 (bind to all addresses) to avoid exceptio..."
Merge pull request #4 from bichinger/revert-3-master

Revert "Change default host to 0.0.0.0 (bind to all addresses) to avoid exception", I will add a default value for the config rather than changing documentation and have all users explicitly set "0.0.0.0"