Improve Redis configuration.
Document custom settings.php.
Remove unwanted file.
Patrick feedbacks.
Merge pull request #32 from platformsh/settings_php

Document using custom settings.php
Adding a going live section.
Merge pull request #33 from platformsh/going_live

Adding a going live section.
Merge pull request #34 from platformsh/dev

Document the "going live" and improve Redis configuration.