tag v2.0.0

Restructure documention with notes on Ubuntu and Fedora for #61

Following a request by @JoshDobbin, support has been added for passin…

…g ADAPTER_DOMAIN_SUFFIX via dhcp-options to work with the Microsoft standard. Also included some additional notes in README.md about using `down` in

dropped privilege situations for clarification.

Merge pull request #11 from jonathanio/feature/more-documentation

Improve Documentation