Add issue template

Also hide it and `CONTRIBUTING.md` in `.github/`

.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,19 @@
+##### Versions
+
+Sarama Version:
+Kafka Version:
+Go Version:
+
+##### Configuration
+
+What configuration values are you using for Sarama and Kafka?
+
+##### Logs
+
+When filing an issue please provide logs from Sarama and Kafka if at all
+possible. You can set `sarama.Logger` to a `log.Logger` to capture Sarama debug
+output.
+
+##### Problem Description
+
+