Update Readme

README.md

@@ -3,3 +3,18 @@
 Checks available MAME Torrents on PleasureDome
 and updates the local versions if more recent
 versions are detected
+
+![Sample output](https://djib.fr/djib/PDMameUpdate/raw/branch/master/screenshot.png)
+
+## Usage
+```shell
+usage: PDMameUpdate.py [-h] [-l] [-d] [-c]
+
+Update PleasureDome MAME Torrents
+
+optional arguments:
+  -h, --help       show this help message and exit
+  -l, --log        Display more log messages
+  -d, --debug      Display debugging messages
+  -c, --countdown  Start with a 5 second countdown
+```