Zeppelin installation is not included in the demo script and not noted in the explanation either

[fersantxez]

The workflow states "Once zeppelin is running...", but zeppelin is not installed neither by the /bin/install.sh script nor explained in the "manual installation" process.

Manually installing zeppelin from CLI with "dcos install package zeppelin" makes zeppelin appear "Disconnected" in the GUI by default. Requires manually adding the HAPROXY_GROUP and HAPROXY_0_VHOST variables as explained in the text.