Provide breadcrumbs to pypi optimisations.

Change-Id: I8f565bba4e99e14c82c72da51653fc46d48b49e8
Add a high level overview presentation.

TripleO can be a little hard to get a handle on. This might help.

Change-Id: I17c62d168bf1d9f02a694ecab2e00bd3879b9009