Merge pull request #286 from gannetson/payout-admin

Project Payout admin
Bug fix for donation phase adjustment.
Change the order thanks page to take an order id.

This commit also adds the pending status for donations and payments.

BB-286 #resolve
Add Dia flowchart for order and payment flow.

BB-281 #resolve
Add pdfs for DocData API documentation.
Use IBANField and SWIFTBICField for Organization account info.
Merge pull request #297 from benkonrath/order-thanks

Order thanks improvents.
Merge pull request #302 from benkonrath/a-swift-iban

Use IBANField and SWIFTBICField for Organization account info.
Project Payout admin
Import and parse bankstatements in admin
Make Sepa app more OO and ready for Direct Debit