Configuration file in addition to CLI options

Provide a configuration file in addition to the existing CLI options as a way to capture the execution in the config file. Python has a library method to do this which I have used in other projects. 
see https://github.com/ptdropper/dt_api/commit/88874bf36acd664d5627107c0931cdd206de4a16  and https://github.com/ptdropper/dt_api/commit/de76e48eee4f18b39c9fd458f67434b9a29cb9f2 