Adding PKafka

Adding reference to my Perl 6 implementation of an Apache Kafka client.

Author: mempko

META.list

@@ -493,3 +493,4 @@ https://raw.githubusercontent.com/autarch/perl6-File-LibMagic/master/META.info
 https://raw.githubusercontent.com/bradclawsie/Hash-Consistent/master/META.info
 https://raw.githubusercontent.com/cspencer/perl6-raspberry-pi-device-ds18b20/master/META.info
 https://raw.githubusercontent.com/yowcow/p6-String-CamelCase/master/META6.json
+https://raw.githubusercontent.com/mempko/PKafka/master/META.info