Be transactional in example fixtures

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Change how database entries are printed, in categories

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Enumerate DNS A records using django-tables2 and Digg-style pagination

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Add tables for other record types

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Hide pagination when it is useless

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
CSS: add nice images to sort columns in tables

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>
Make zone.description column not orderable

Signed-off-by: Nicolas Iooss <nicolas.iooss_git@polytechnique.org>