Merge pull request #3602 from rht/throughput

Add closed PRs, Issues throughput

README.md

@@ -9,6 +9,8 @@
 [![GoDoc](https://godoc.org/github.com/ipfs/go-ipfs?status.svg)](https://godoc.org/github.com/ipfs/go-ipfs)
 [![Build Status](https://travis-ci.org/ipfs/go-ipfs.svg?branch=master)](https://travis-ci.org/ipfs/go-ipfs)
 
+[![Throughput Graph](https://graphs.waffle.io/ipfs/go-ipfs/throughput.svg)](https://waffle.io/ipfs/go-ipfs/metrics/throughput)
+
 > IPFS implementation in Go
 
 IPFS is a global, versioned, peer-to-peer filesystem. It combines good ideas from