Added some setup documentation.

README.md

 # lou-server
 
-Replacement for ``jspsych-server`` based on Laravel.
\ No newline at end of file
+Replacement for ``jspsych-server`` based on Laravel.
+
+## Using lou-server in your projects
+
+1. Create a new project in gitlab and put your static html into
+   the directory ``client/public`` and create the
+
+2. Add lou-server as a submodule to your project:
+  ``git submodule ssh://git@arc-git.mpib-berlin.mpg.de:22973/arc-support/programming/lou-server.git server``
+
+After this your project structure should look like this:
+
+```
+.
+├── client
+│   ├── public
+│   │   ├── index.html
+│   │   ├── ...
+│   └── resources
+│       └── .keep
+└── server
+    ├── app
+    ├── artisan
+    ├── ...
+```