Voice channel mention (#932)

* Voice channel mention

I recently noticed voice channels can be mentioned just like text channels. A small change to the code to implement this feature.

* Voice channel mention

* vc.getName() changed to vc.getAsMention()

src/main/java/com/jagrosh/jmusicbot/commands/admin/SetvcCmd.java

@@ -62,7 +62,7 @@ public class SetvcCmd extends AdminCommand
             else
             {
                 s.setVoiceChannel(list.get(0));
-                event.reply(event.getClient().getSuccess()+" Music can now only be played in **"+list.get(0).getName()+"**");
+                event.reply(event.getClient().getSuccess()+" Music can now only be played in "+list.get(0).getAsMention());
             }
         }
     }