PLT-3753 Added Segment analytics (#3972)

vendor/github.com/segmentio/analytics-go/Readme.md

@@ -0,0 +1,8 @@
+# analytics-go
+
+  Segment analytics client for Go. For additional documentation
+  visit [https://segment.com/docs/libraries/go](https://segment.com/docs/libraries/go/) or view the [godocs](http://godoc.org/github.com/segmentio/analytics-go).
+
+## License
+
+ MIT