added information about updating to the README

README.md

@@ -29,11 +29,19 @@ Any PHP enabled webserver will do. You need to make sure that it has **session s
 
 Information about configuring PHP sessions can be found here: https://php.net/manual/en/session.installation.php
 
-### Quickstart
+### Quick Installation
 All you need to do is download `index.php` in this repository and put it in a folder on your web server. You need to make sure that PHP can write to that folder though. However, you can deny write access to the file itself since there is no automatic updating function built in yet.
 
 If you prefer, you can clone this repository or use the "Download Zip" button to the right.
 
+
+### Updating
+1. Rename your old `index.php` to `index.old.php` temporarily
+2. Download the new version
+3. Open both files for editing
+4. Copy your settings over the new settings (making sure that you don't delete any new settings - it will be obvious if you do this if you have error reporting enabled)
+
+
 ### Building
 Pepperminty Wiki uses a simple PHP based build script. If you want to run this script yourself (for whatever reason), follow these instructions: