Configuration documentation update

[jwsample]

I did an overhaul of the setup/config documentation. Goes into more detail of what the different settings do and what issues may pop up. Not all inclusive but a decent starting point. No code changes here, just documentation. You can view what it looks like here: https://github.com/jwsample/hassio.addons/tree/docs/addon-cloudflare-argo/cloudflareargo

For some reason all the links at the bottom disappeared even though I left them untouched in the markdown. Let me know if you have any idea why.

[wlatic]

Looking at this and will suggest fixes before pushing.

The schema for writing those readme's is a nightmare!