- adds TOML based configuation files
- with example configuratios in config-examples
- reimplments arcane CLI argument parser as automaton
- adds a new CLI focused arround configuration files
- moves all file utility stuff from `main.rs` to `util.rs`
- moves all AppServer stuff to dedicated `app_server.rs`
- add mio for multi-listen-socket support (should fix#27)
- consistency: rename private to secret
