Most of the copy is duplicated except for the places where it matters.
This allows for any page of this documentation to be page one. If
someone only cares about using hosts first, they can go directly there
and start listing hosts, creating them, etc. without much other
prompting.
Change-Id: Id621947af5d4c3ca53af24904f5f16d3d88bc8b8
75c3531c43