move workaround logic to utilities module
set CNAME migration to clobber conflicts
CNAMEs unique by label and domain
better notification for broken foreign keys
migrations don't crash on cname validation errors
Specify email so Git doesn't freak out
Merge pull request #636 from drkitty/fix-tests-again

Specify email so Git doesn't freak out
Merge pull request #627 from murrown/label_domain_workaround

CNAME migration fix