Merge pull request #93 from javiereguiluz/patch-1

Add a README file

Author: weaverryan

README.md

@@ -0,0 +1,18 @@
+Symfony Docs Builder
+====================
+
+This project is used to build the [Symfony Documentation][1] both in
+https://symfony.com and the Continuous Integration service used in the Symfony
+Docs repository.
+
+This project is considered **an internal tool** and therefore, you
+**shouldn't use this project in your application**. Unlike the rest of the
+Symfony projects, this repository doesn't provide any support and it doesn't
+guarantee backward compatibility either. Any or the entire project can change,
+or even disappear, at any moment without prior notice.
+
+If you are looking for a project to build your reStructuredText documentation
+in PHP, use [Doctrine RST parser][2] (which is also used by this project internally).
+
+[1]: https://github.com/symfony/symfony-docs
+[2]: https://github.com/doctrine/rst-parser