80 jamf token auth

[ParadoxGuitarist]

• Adds better logging for the settings. (which I had to change and noticed was straight up wrong in places. Oops.)
• Adds a new --version flag so we can help each other by not reporting old bugs.
• Gets tokens automatically with basic auth. I'm not sure how this is absolutely better than just using basic auth for all the calls, but ok. Replaces the token/headers within 5 minutes of the token expiring.
• Gets a token against the Jamf API as part of the dryrun, which has the added bonus of being another test.