Fuel 8.0 docs are missing on docs.m.com

[Olena Logvinova]

Since Fuel moved under the big tent with its documentation (http://docs.openstack.org/developer/fuel-docs/), the latest Fuel docs version available now is Mitaka. But people are still looking for docs how to install current MOS 8.0 using Fuel 8.0, and we don't have Fuel 8.0 docs anymore.

Acceptance criteria: Fuel 8.0 docs (Installation and User Guides) are available on docs.m.com in the stable/8.0 branch.

[Fuel Devops McRobotson (fuel-devops-robot)]

Fix proposed to branch: stable/8.0
Change author: Olena Logvinova <email address hidden>
Review: https://review.fuel-infra.org/21893

[Fuel Devops McRobotson (fuel-devops-robot)]

Reviewed: https://review.fuel-infra.org/21893
Submitter: Svetlana Karslioglu <email address hidden>
Branch: stable/8.0

Commit: 142c009886c6d226e9e436da13f675a3a3cd3a26
Author: Olena Logvinova <email address hidden>
Date: Tue Jun 21 17:52:06 2016

[Fuel 8.0 guides] Return Fuel v8.0 guides to stable/8.0

This patch:

- returns Fuel 8.0 Install and User guides to
  the mos-docs stable/8.0 branch, as user may still need
  to install MOS 8 using Fuel 8, but the Fuel Mitaka (upstream)
  guide contains NEW Mitaka articles that are not available
  in Fuel 8.0;
- adapts the Fuel section on the Intro page to adding
  Fuel 8.0 guides;
- removes the Fuel `Developer's Guide` link from the
  'Additional Documentation section (as the link for all
  upstream Fuel content is moved to Intro);
- fixes noticed formatting, grammar mistakes and typos the
  /pdf folder (changes year from 2015 to 2016)
- adds pdf/pdf_mu path to the conf.py file to generate a PDF
  version of MU 8.0.

Change-Id: Iaaca8f2a69e746445a34b58ada0680d922ea5cb4
Closes-Bug: #1581360