[r=jamesh] database dump script
Patches applied:

 * stuart.bishop@canonical.com/launchpad--dba--1--patch-8
   New PostgreSQL backup sript being used in Production

 * stuart.bishop@canonical.com/launchpad--dba--1--patch-9
   Merge from Rocketfuel

 * stuart.bishop@canonical.com/launchpad--dba--1--patch-10
   Add return code to pgbackup.py

 * stuart.bishop@canonical.com/launchpad--dba--1--patch-11
   dropdb that removes all safety nets and terminates connections

 * stuart.bishop@canonical.com/launchpad--dba--1--patch-12
   More appropriate name

 * stuart.bishop@canonical.com/launchpad--dba--1--patch-13
   Return success if database doesn't exist

 * stuart.bishop@canonical.com/launchpad--dba--1--patch-14
   Make pgrestore.py handle compressed dumps