Resolve "Update db ffdn"

Closes #20

See merge request !20

Resolve "Update requirements.txt"

Closes #19

See merge request !19

Merge branch '13-update-description-removing-the-fact-that-we-have-special-prices-and-indicate-that-we-want-to-do' into 'master'

Resolve "Update description removing the fact that we have special prices and indicate that we want to do an order/month"

Closes #13

See merge request !18

Resolve "Provide ffdnapi /isp.json with correct content-type"

Closes #18

See merge request !17

Resolve "Change mail address for admin receipt of the order"

Closes #17

See merge request !16

Change Neutrinet BIC bank account

Closes #14

See merge request !15

Strip bank_id's last char

CSV import create duplicate entries because it relies and the `bank_id`
field to always be the same for a transaction, across exports.

Observations show a transaction always has the same `bank_id` across
exports, **except** for the last char. I haven't found any documentation
about the CSV/bank_id format but looking a the duplicate entries we have
in the database and at entries from a couple of difference CSV exports,
it should fix our issue.