No longer require true/false for the -m.

src/main/java/com/graywolf336/jail/command/commands/JailCommand.java

@@ -27,7 +27,8 @@ public class JailCommand implements Command {
 		try {
 			new JCommander(params, args);
 		}catch(ParameterException e) {
-			return false;
+			sender.sendMessage(e.getMessage());
+			return true;
 		}