added osclass (#996)

Osclass open source included

README.md

@@ -474,6 +474,7 @@ _Recipe management_
   * [OpenCart](https://www.opencart.com) - Free open source shopping cart solution. ([Source Code](https://github.com/opencart/opencart)) `GPLv3` `PHP`
   * [Open Classifieds](http://open-classifieds.com/) - Free open-source, self-hosted CMS for classifieds sites. ([Source Code](https://github.com/open-classifieds/openclassifieds2)) `GPL` `PHP`
   * [Open eShop](https://open-eshop.com/) - Sell your digital goods with licenses and provide support. ([Source Code](https://github.com/open-classifieds/open-eshop)) `GPL` `PHP`
+  * [Osclass](https://osclass.org/) - One-stop shop to building your own classifieds marketplace. ([Source Code](https://github.com/osclass/Osclass)) `Apache` `PHP`
   * [OXID eShop](http://oxidforge.org) - OXID eShop is a flexible open source e-commerce software with a wide range of functionalities. ([Demo](http://demoshop.oxid-esales.com/community-edition/), [Source Code](https://github.com/OXID-eSales/oxideshop_ce)) `GPLv3` `PHP`
   * [Open Food Network](https://openfoodnetwork.org/) - An online marketplace for local food. It enables a network of independent online food stores that connect farmers and food hubs with individuals and local businesses. ([Source Code](https://github.com/openfoodfoundation/openfoodnetwork)) `AGPLv3` `Ruby`
   * [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)) `OSLv3` `PHP`