export general ledger

[Aaron Laws]

>
> Alternatively there are a number of scripts that can take gnc files of
> some flavour and produce ledger-cli / beancount compatible files which are
> generally mores useful than csv files for accounting data anyway.


It looks like ledger-cli dropped gnucash import support in 2009?

https://github.com/ledger/ledger/commit/71642d98

Also

https://github.com/ledger/ledger/commit/aece6339, and
https://github.com/ledger/ledger/commit/d56f9c4032