Ignored only the rules about continuing / hanging indentation.
Also, added __init__.py to tests so that pylint discovers them. (I don't
buy pytest's BS about installing your package.)
Post notes had mixed up column types. I fixed that and at the same time,
I took the opportunity to convert everything into Unicode. Also, I've
changed existing migrations rather than creating new ones - it's not
like we're even close to alpha...
rr-