Adding a note regarding running  bindep per project
Adding a note regarding running  bindep per project

As I sadly found out yesterday, new users will have to
run bindep on each individual repo they clone if they wish
to build project documentation. This is obvious to those
who have been working on the project forever, but this was
my first new computer in 5 years and I was pretty stumped -
couldn't work out why I needed liberasure to build swift
docs but here we are.

Change-Id: I27fb8ed862f3c2dfafba5f2d916a8c99fce7ec10

openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals