More instructions

I came across this before I ran across Maestro and found it a little confusing, so I figured some more instructions and some examples (cribbed mostly from the maestro-ng repo) would be useful.
The reason for port 2375 here is because I'm using boot2docker which seemed like the primary installation mechanism according to docs.docker.com now on OSX.  I'm unclear where the 4243 default came from (introduced by docker-py?) because https://docs.docker.com/installation/ubuntulinux/ seems to indicate docker daemons default to port 2375 also.  I can clear up the comment on line 8 with some feedback here.