Fixing badness in south files.

@jamalex, wrote this email, then solved the problem.  Can you check that this is the right fix?

CachedPassword exists in the db, but when I run ./manage.py schemamigration securesync --auto, I get a migration file creating that table.

It's created in one of the 0019 migration files.  I assume that the fact that there are multiple 0019 migration files is part of the problem, but I thought that was solved by using the merge=True flag.

I look at 0020_*, and that file has no cachedpassword in it.  When I copy that table in, seems to iron things out.

Help?