Comments

Feel free to test them to your heart's content. We will have to clear the database before merging anyway.

No tests for this one as I really don't know what they would look like.

Oh yeah, and in the future, we might want to consider enabling comments (and possibly ratings?) for companies, which will be very simple due to how the comment feature is designed. But that doesn't have to happen now and I would like to discuss it in more detail with you anyway.