TODO

Add tutorial
- Config loading
- Config parsing
- Config manip
- Env and config var substitution
  - Escaping
Java properties
- Add unicode escaping
- Support multi-line values with backslash
- Add escaping of key/value separator = and :
INI config
- Case insensitive properties and sections
- Escape characters
- Support multi-line values with backslash
TOML
- Add support for the standard (https://github.com/toml-lang/toml)