WooCommerce payment gateway plugin

Hello, we are developping an e-commerce website based on Wordpress 3.6 and WooCommerce plugin. Our client will sell products in France / Europe (E.U) / World. This website is actually almost over, but we need a payment plugins to make it fully functional. Our client will sell two types of products: - Subscriptions : thanks to the plugin Woothemes "Subscriptions" (a payment each month for a limited or unlimited period) : [login to view URL] - Typical products : through traditional engine shop - (a one-time payment) Our client will use Paybox as payment solution (which includes the ability to sell online subscriptions). However plugins / payment gateways WooCommerce compatible Paybox are not functional with the "Subscriptions": [login to view URL] When we test to buy something we see that: - Paybox payment gateway (open source plugin) works well with classic products - Paybox payment gateway (open source plugin) doesn't work with subscription products What you have to do: - "Linking" all the "Subscriptions" plugin features to Paybox by building a payment gateway plugin. To be more precise each customer should be able to subscribe/unsubscribe to a product (for limited/ unlimited period; with a daily/monthly/yearly automatic payment...). The payment should be taken into account by Paybox, but also its possible desincriptions (proposed by Subscriptions plugin). - Configure all options Payment Gateway and Paybox (if applicable) - Deliver a fully functional ready-to-use configuration This plugin will be installed by yourself and must be fully functional. It must be compatible with: - Woo Theme "Subscriptions" (products add on) - and WooTheme "Per product" (shipping) - and all the actual configuration