PyPi site documentation: q's / suggestions

[afitzgerrell]

1. There are two Requirements sections...one near the top of the page, but another toward the bottom of the page after the Troubleshooting and Contributing sections. The second Requirements section lists Python and Poetry and proceeds to detail how to install Poetry, followed by a Releasing section. Are these relevant or are they to be removed?

2. At the Installation section, I suggest removing "That's it! Now we're ready to run MetGenC and see what it can do:" AND the code box showing the usage of metgenc since Usage is a section unto itself further down on the page.

3. In the Usage section, the 2nd code box (showing metgenc --help response) is out of date as it's not showing the validation option and explanation. As time allows, can this be updated?

[afitzgerrell]

Now that I learned that the README.md and pypi are actually supposed to jive, i've taken it upon myself to make these edits and relinquish kevin from the burden of this fluffy (but important!) documentation stuff.