Add openSUSE Basic Install Guide to docs.o.o/trunk

Change-Id: Ife42fe26d42058aabc2864303475cd04c0c69929
Add preface Image Guide

The Image Guide did not show the revision history, a simple
preface that shows a history has been added.

Change-Id: Iff409277bc64e3a3b514607ce4038de0c35f0dea
Merge "Add openSUSE Basic Install Guide to docs.o.o/trunk"
Merge "Add preface Image Guide"