- Add `output_dir` to cli argument
- This argument allows you to save output files in a special folder, not just current dir
- Refactor 'cli.rs'
- Add `Builder` for `AppConfig`
- Add `Error` instead separated panics
- Upgrade dependencies
- display of partial downloads in the summary
- custom file name that is displayed after the summary ensuring it is visible
- log-to-file flag which specifies that logs will be sent to the default directory
- verbose flag (v) used to configure the log levels
- disabling the progress bars when logging to the terminal is active
