CLI options should be able to filter which statistics are displayed

[rowedonalde]

The default should be to display the current 4 stats (compression type, original size, compressed size, and compression rate), but each statistic should be assigned a CLI flag. If any flags are specified, only the flagged ones should be displayed.

[aaronshim]

Hi @rowedonalde, we met a couple weeks ago at the Rust meetup in Seattle. Would you have guidelines for new contributors, particularly anything I should be aware of before I start hacking away at this one? Thanks so much for your help!

[rowedonalde]

Hey @aaronshim, thanks for getting in touch. Style-wise, go ahead and follow the existing examples throughout. You'll want to fork this project and then start work on a new branch, and then when you're ready to submit the patch, make the pull request from your topic branch on your fork try to merge into my master.