tables shouldn't exist yet, and the exists keyword is relatively new in
sqlite. This has been breaking a lot of people on Suse Enterprise Linux,
for instance.
Makes the estate dialog fully functional. Implements all client facing functionality. Moves estate data from estate_settings.xml, which is used to provide defaults, to the region data store. Creates one estate for each region, and places the region in it. Converts all region bans to estate bans.
