Renormalize Karma Topics

[ericthelemur]

Some karma topics have an upper and lower case duplicate (as well as various unicode variations), such as apollo. I assume this is more widespread than this, so it's probably worth rerunning the normalization. This was done as a migration before, probably need it as a standalone script now.

https://github.com/UWCS/apollo/blob/master/migrations/versions/4fd69f28b6b9_normalise_karma_topics.py