add copy mode info

README.md

@@ -17,6 +17,7 @@ Features
 - overlay a logo
 - trim and fade the last clip, to get full 24 hours, if the duration is less then 6 seconds add a blank clip
 - set custom day start, so you can have playlist for example: from 6am to 6am, instate of 0am to 12pm
+- copy mode, for more infos take a look in the wiki
 - normal system requirements and no special tools
     - we only need **ffmpeg**, **ffprobe** and a buffer tool like **mbuffer** or **pv**
     - no GPU power is needed
@@ -57,4 +58,3 @@ Installation
 - set variables in config file to your needs
 - use **get_playlist_from_subfolders.sh /path/to/*.mp4s** as a starting point for your playlists (path in script needs to change)
 - activate service and start it: **sudo systemctl enable ffplayout && sudo systemctl start ffplayout**
-