Updated README with new feature

Signed-off-by: Jim Martens <github@2martens.de>

README.md

@@ -38,9 +38,14 @@ date: <created>
 start_date: <begin>
 end_date: <end>
 location: <location>
+address: <address>
 ---
 ```
 
+Both location and address are extracted from the location field in a calendar event. If a colon (:) is existing
+the first part is the location and the latter part the address. If it does not exist the content of the location
+field will be used for both location and address.
+
 The full usage of this tool becomes obvious if you create a cronjob or something similar that executes this code
 every x amount of time.