Updated readme

readme.markdown

@@ -33,7 +33,7 b' 3. Setup a database in `neboard/settings'
 
 Depending on configured database and search engine, you need to install corresponding dependencies manually.
 
-Default database is *sqlite*, default search engine is *simple*.
+Default database is *sqlite*. If you want to change the database backend, refer to the django documentation for the correct settings. Please note that sqlite accepts only one connection at a time, so you won't be able to run 2 servers or a server and a sync at the same time.
 
 4. Setup SECRET_KEY to a secret value in `neboard/settings.py
 5. Run `./manage.py migrate` to apply all migrations