Readded README.md

Had been removed by pull request #67 from ohpolly/magento-1.9.3.4

Author: Pascal Borkenhagen

README.md

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+# Magento Community Edition
+
+Firegento Magento Community Magento-1.x Mirror Github Repository with Patches.
+
+[![Gitter](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/firegento/magento?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge)
+
+- [available magento versions](https://github.com/firegento/magento/releases)
+- [an overview of all patches](https://github.com/brentwpeterson/magento-patches)
+
+## Installation via Composer
+
+If you do not know what Composer is, please first read [this](https://getcomposer.org/doc/00-intro.md).
+
+To generate `composer.json` and install magento for the first time run:
+
+```
+composer require magento-hackathon/magento-composer-installer ~3.0
+composer require aydin-hassan/magento-core-composer-installer ~1.2
+composer require firegento/magento ~1.9.3.1
+```