Apply profanity filter to chat slash commands.

And whispers.  Doesn't soft mute player or explain, just cancels the
command.  If player is brazen and goes to standard chat, then he'll get
muted there.

src/me/ryanhamshire/GriefPrevention/PlayerEventHandler.java

@@ -582,6 +582,11 @@ class PlayerEventHandler implements Listener
 		        event.setCancelled(this.handlePlayerChat(event.getPlayer(), event.getMessage(), event));
 		    }
 	        
+	        if(!player.hasPermission("griefprevention.spam") && this.bannedWordFinder.hasMatch(message))
+	        {
+	            event.setCancelled(true);
+	        }
+		    
 		    //unless cancelled, log in abridged logs
 	        if(!event.isCancelled())
 		    {