The setup contains a three node master-slave cluster with both
readwritesplit and readconnroute.
Removed the duplication of the configuration files in the README and
provided links instead.
The docker image now simply installs the latest MaxScale version instead
of building it. This significantly reduces the amount of maintenance that
the image requires.
Updated the configurations to allow runtime definition of servers and
updated README.md to reflect the changes in the files. Pointed links to
2.2 instead of develop. Removed text from the readme that was not strictly
related to running the MaxScale image.
