* Simplify the Deployment section.
Redid add-relation to mysql-router.
Talk of multiple nodes being required consolidated.
Setting 'cluster-name' is not of much value (removed).
Deprecated shared-db endpoint command removed.
Scaling out command was moved to the CDG.
* Apply current README template
Depends-On: I9c5e2f4a8d5f24ee8b0cedb3d3af13bce8c90e29
Change-Id: If62a72fffa5e6b7c37505e2195542f800aa19842