- add --print-config option to output config to stdout
- config file name is config.lua and is look for under
--state-dir (default: $XDG_CONFIG_DIR/saturnMODEL/)
- wrapper scripts will automatically create config file if needed
- lua version is configurable at build time by passing LUA_VERSION=XX
to make. XX is lua by default but for example can be luajit
- command-line option have higher priority over config file
