Updated README.md

Signed-off-by: Gergely Polonkai <polesz@w00d5t0ck.info>

README.md

@@ -1,4 +1,29 @@
 kekrozsak
 =========
 
-blueroses.hu repository
+This repository contains the source code of a CMS/social site written in
+PHP 5.3 using the Symfony 2.1 framework.
+
+The site is originally the engine of http://bluroses.hu/ but I meant it to be totally open source.
+
+Installation
+------------
+
+After first downloading the repository, you should run
+
+    ./composer.phar update
+
+to fetch all the required dependencies.
+
+After each pull, you should run
+
+    ./update.sh
+
+to update everything else (git submodules, cache, assets and so on). If update.sh is changed, I advise to run it again. It can do no harm...
+
+Contributing
+------------
+
+If you want to contribute to this project for any reason, you can do it in the GitHub way: fork the repository, modify the source and create a pull request.
+
+If you can't write code in PHP, but have an idea, feel free to open an issue.