actually use the custom user agent tee hee

src/api.vala

@@ -154,6 +154,7 @@ public class Subsonic : Object {
         this.parameters = @"u=$(Uri.escape_string(username))&t=$(Uri.escape_string(token))&s=$(Uri.escape_string(salt))&v=1.16.1&c=eu.callcc.audrey";
 
         this.session = new Soup.Session ();
+        this.session.user_agent = "audrey/linux";
 
         this.artist_list = new ListStore (typeof (Artist));
         this.album_list = new ListStore (typeof (Album));