Merge pull request #46 from mattymo/replace-savanna

replace Savanna documentation
Virtualbox network settings for Quantum
Merge pull request #47 from xenolog/Q-32

Virtualbox network settings for Quantum
Added note that Platform Tests are not working

The note was added to the Release Notes

Also fixed bullet lists - they were rendered incorrectly due to missing line breaks
update overview and HA logical setup per review

 * less text and more structure in networking and storage overview
 * more concise Ceph HA description
 * use active voice instead of passive voice
added murano.rst to HTML and PDF output
Merge pull request #52 from SvetlanaS/oct22

added murano.rst to HTML and PDF output
Fix type in index.rst
Merge pull request #53 from adanin/fix-index

Fix typo in index.rst
Updated images for docs
Moved the note one level up as Michael requested
Merge pull request #54 from e0ne/png-images

Updated images for docs
Partially added Svetlana's suggested wording.
Changed the section name as Svetlana suggested
Merge pull request #49 from dmitrymex/master

Added note that Platform Tests are not working
Merge pull request #51 from angdraug/ref-arch-overview

update overview and HA logical setup per review
Added documentation for Murano OSTF tests.
Fixed typo
Fixed several issues.
Fixed tests descriptions.