Fix: make sure consumer.pl can find the AnyEvent::NSQ::Reader lib

Signed-off-by: Pedro Melo <melo@simplicidade.org>

examples/consumer.pl

@@ -2,7 +2,8 @@
 
 use strict;
 use warnings;
-use lib 'lib';
+use FindBin;
+use lib "$FindBin::Bin/../lib";
 use AnyEvent;
 use AnyEvent::NSQ::Reader;