add CoreShop to e-commerce section

README.md

@@ -407,6 +407,7 @@ _Recipe management_
 * [PrestaShop](https://www.prestashop.com/) - PrestaShop offers a free, open-source and fully scalable e-commerce solution. ([Demo](http://demo.prestashop.com/), [Source Code](https://github.com/PrestaShop/PrestaShop)) `OSL 3.0` `PHP`
 * [Shoop](https://www.shoop.io/) - Django powered fully customizable open source e-commerce framework for small and large sites. ([B2C demo](https://demo1.shoop.io/), [B2B demo](https://demo2.shoop.io/), [Source Code](https://github.com/shoopio/shoop)) `AGPLv3` `Python`
 * [WooCommerce](https://www.woothemes.com/woocommerce/) - WordPress based e-commerce solution. ([Source Code](https://github.com/woothemes/woocommerce)) `GPL` `PHP`
+* [CoreShop](https://www.coreshop.org) - CoreShop is a e-commerce plugin for Pimcore ([Source Code](https://github.com/coreshop/CoreShop)) `GPL` `PHP`
 
 
 ## DNS