Implementing iDeal for membership fee payment

[fsmanuel]

We are going to use Ideal for payments of membership fee from public signup route (there will be also a route for people who want te become a member on the spot during pickup day who will pay with PIN/Eurocard)
proces:
potential members fill in their emailadress, get an email with an invitation to become a member with link to online membership form. (this is already functional)

After the form has been entered there should apear an ideal payment. if the ideal payment is confirmed than we wil get an confirmation via xml or email which should activate the member so they can order.

the ruby script for ideal payments with molly/paytor
https://github.com/manuelvanrijn/ideal-mollie