merge v0.96 of the launchpad db schema
Patches applied:

 * mark.shuttleworth@canonical.com/launchpad--devel--0--patch-4
   First half of the big Table.table to Table.id rename and review

 * mark.shuttleworth@canonical.com/launchpad--devel--0--patch-5
   merge from rocketfuel

 * mark.shuttleworth@canonical.com/launchpad--devel--0--patch-6
   Major review of database consistency

 * mark.shuttleworth@canonical.com/launchpad--devel--0--patch-7
   merge patch from rob.weir making arch branch version optional

 * rob.weir@canonical.com--2004/launchpad--devel--0--base-0
   tag of mark.shuttleworth@canonical.com/launchpad--devel--0--patch-5

 * rob.weir@canonical.com--2004/launchpad--devel--0--patch-1
   Make Branch.version not NOT NULL.