Added :load [playlist]<tab>, command for loading specified playlist (autocompleted)

common/content/completion.js

@@ -1409,6 +1409,21 @@ function Completion() //{{{
             }
         },
 
+        playlist: function playlist(context, args)
+        {
+            let playlists = Player().getPlaylists();
+            let length = playlists.length;
+            let playlistNames = [];
+
+            for (var i=0; i < length; i++)
+            {
+                playlistNames[i] = [playlists[i].name.toString(),playlists[i].name];
+            }
+            
+            context.title = ["Playlists"];
+            context.completions = playlistNames;
+        },
+
         buffer: function buffer(context)
         {
             filter = context.filter.toLowerCase();