Payee / narration fields are possibly switched.

[redstreet]

See #55

I'd like to clean up the situation around payee/narration for good and do the right thing, whatever that is. It's fine to backward compatibility if needed for the benefit of getting this right for the longer run.

If at all you have the time and inclination figure out the full picture and submit a comprehensive solution, that would be great, and I'd rather accept that over the temporary fix of documenting it. If you're not inclined to, that's fine too: this needs to be documented and worked on at some point.

With that said, the things that come to mind are:

• Beancount reference
• solving for the comment here
• solving for the investments transaction builder
• ensuring the current importers don't break (it's okay if they don't do the same thing as earlier, and do the right thing instead; however, they shouldn't crash)
• ensuring smart_importer works correctly with the solution
• documenting methods to fix backward compatibility for users