New WooCommerce Payment Gateway - 4th Try

I need a new payment gateway for wooCommerce. This payment Gateway have to include the php_sepa lib from github : [login to view URL] This are the requirements : - When the User selects this new wooCommerce Payment Gateway at the checkout, the user has to fill 3 new text-fields (only when this payment gateway is selected): --- Name --- BIC --- IBAN -- BIC and IBAN must be validated with the functions from the php_sepa lib. - This 3 fields must be stored at the database - After this the checkout is done, but the order/invoice is still unpaid - The admin must a have a new menu-item at the backend, where he get's a list of all unpaid orders/invoices with this payment gateway - At this list we need the fields : --- order/invoice number --- order/invoice date --- order/invoice amount --- Name --- BIC --- IBAN - If the admin hit's a "start processing" button at this new backend-page a batch-process will start and do : --- creates an email that will be sended to the order/invoice customer - the text must be definable at the wooCommerce Backend --- mark the order/invoice as payed - For all the processed records the plugin must create a new record at a new database table with this fields ----- date (now) ----- number of all assigned records ----- amount of all assigned records ----- filename of the created XML file (see next description) - For all the processed records the plugin must create a SEPA DD file with the php_sepa lib. Code must be well documented Code must be multi-language ready ( with he default wordpress functions __ and _e ) Code must be multi-site ready Code must be multi-currency ready You don't have to change the wooCommerce files. You don't have to add any plugins.