Add generated database diagrams (initial cut)
Patches applied:

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--base-0
   tag of stuart.bishop@canonical.com/launchpad--devel--1--patch-124

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-1
   Example to demonstrate postgresql_autodoc output

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-2
   Work in progress

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-3
   Work in progress

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-4
   Post-processing proof of concept working

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-5
   Work in progress

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-6
   Work in progress

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-7
   Work in progress

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-8
   tweaking

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-9
   tweaking

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-10
   Switch to postscript

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-11
   Merge from Rocketfuel

 * stuart.bishop@canonical.com/launchpad--dbdiagrams--0--patch-12
   Add generated database diagrams (initial cut)