免费magento支付接口扩展
安装key方法：
1.登入网站管理后台
2.选择菜单System(系统)->Magento Connect->Magento Connect Manager
3.Log In ，填入需要安装的key,点击install自动安装完成。
1.Alipay Payment Gateway（支付宝接口）
官方下载地址：http://www.magentocommerce.com/magento-connect/cosmocommerce/extension/2226/alipay-payment-gateway/
官方key：magento-community/Cosmo_Community_AlipayPayment
2.Yeepay Payment Gateway（易宝支付接口）
官方下载地址：http://www.magentocommerce.com/extension/2239/yeepay-payment-gateway/
官方key：magento-community/Cosmo_Community_YeepayPaymentGateway
3.Ctopay Payment Gateway(收汇宝接口)
官方下载地址：http://www.magentocommerce.com/extension/2241/ctopay-payment-gateway/
官方key：magento-community/Cosmo_Community_CtopayPaymentGateway
4.99Bill Payment Gateway(快钱接口)
官方下载地址：http://www.magentocommerce.com/extension/2227/99bill-payment-gateway/
官方key：magento-community/Cosmo_Community_99BillPaymentGateway
5.Ecpss Payment Gateway(e汇通接口)
官方下载地址：http://www.magentocommerce.com/magento-connect/cosmocommerce/extension/2225/ecpss-payment-gateway-e
官方key：magento-community/Cosmo_Community_EcpssPaymentGateway