Preface corrections
Small corrections to the intro to introuduction section
Change the defintion of consensus to eventually agree instead of majority
Small corrections and // -> line break
Small corrections to introduction problem
More flat structure for motivation section

.. and corrected two generals problem.

Byzantine faults is mentioned before introduced
Move a bit around again
Small corrections to raft chapter
Small correction to requirements
Small corrections to analysis
Changes to leader election
Corrections for log replication
Nicer links and not red table of contents