Add 'based-on' to top-level readme

README.md

@@ -4,7 +4,10 @@ go-resiliency
 [![Build Status](https://travis-ci.org/eapache/go-resiliency.svg?branch=master)](https://travis-ci.org/eapache/go-resiliency)
 [![GoDoc](https://godoc.org/github.com/eapache/go-resiliency?status.svg)](https://godoc.org/github.com/eapache/go-resiliency)
 
-Resiliency patterns for golang. Currently implemented are:
+Resiliency patterns for golang.
+Based in part on [Hystrix](https://github.com/Netflix/Hystrix),
+[Semian](https://github.com/Shopify/semian), and others.
+Currently implemented are:
 - circuit-breaker pattern (in the `breaker` directory)
 - semaphore pattern (in the `semaphore` directory)
 - deadline/timeout pattern (in the `deadline` directory)