The ubuntu PPA was for havana and there appears to be no
more modern equivalent
The nova and neutron designate plugins both link to github
repositories that are now deleted.
The chef cookbook, debian packages and example plugin have no
updates in the last 7 years
The bug and blueprint links are current and are already on the
getting-started page
The git repo has been added to the getting started page as that
was the only remaining link
Change-Id: I5d93ffdbeac54a396fc34d13a96636b23c5845e1
6e8080e82d