Update README.md

Add godoc.org link

README.md

@@ -3,7 +3,8 @@ sarama
 
 Sarama is an MIT-licensed Go client library for Apache Kafka 0.8 (and later).
 
-Documentation is available via godoc.
+Documentation is available via godoc at http://godoc.org/github.com/Shopify/sarama
 
+Other related links:
 * https://kafka.apache.org/
 * https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol