``Sphinx`` / ``readthedocs``-compatible Documentation

[Mischback]

Provide a setup for sphinx, including a general structure for the documentation.

Pages

• [x] Getting started
• [x] Mail in a nutshell
• [x] Configuration References
• [x] Cookbook
  • [x] Keep configuration in a dedicated directory or repository
  • [x] Should be highly recommended!
  • [x] In-depth setup of IP and DNS and how these things are working together
  • [x] Including the guide on How to ensure Postfix uses the right IP
  • [x] See #19
• [x] Developer Documentation
  • [x] Development Setup
  • [x] Coding Style
  • [x] Git Branching Model
• [x] References
  • [x] Official Documentation
  • [x] Guides
  • [x] Other Projects