Merge pull request #558 from vectaport/patch-1

Add github.com/vectaport/flowgraph to Distributed Systems.

README.md

@@ -277,6 +277,7 @@ Please take a quick gander at the [contribution guidelines](https://github.com/a
 
 *Packages that help with building Distributed Systems.*
 
+* [flowgraph](https://github.com/vectaport/flowgraph) - MPI-style ready-send coordination layer.
 * [go-jump](https://github.com/dgryski/go-jump) - A port of Google's "Jump" Consistent Hash function.
 * [gorpc](https://github.com/valyala/gorpc) - Simple, fast and scalable RPC library for high load.
 * [grpc-go](https://github.com/grpc/grpc-go) - The Go language implementation of gRPC. HTTP/2 based RPC.