Update README.md

Add badges.

README.md

@@ -1,5 +1,11 @@
 # Go Wetware
 
+[![Godoc Reference](https://img.shields.io/badge/godoc-reference-blue.svg?style=flat-square)](https://godoc.org/github.com/wetware/go)
+[![Go Report Card](https://goreportcard.com/badge/github.com/wetware/go?style=flat-square)](https://goreportcard.com/report/github.com/wetware/go)
+[![tests](https://github.com/wetware/go/workflows/Go/badge.svg)](https://github.com/wetware/go/actions/workflows/go.yml)
+[![Matrix](https://img.shields.io/matrix/wetware:matrix.org?color=lightpink&label=support%20chat&logo=matrix&style=flat-square)](https://matrix.to/#/#wetware:matrix.org)
+[![white paper](https://img.shields.io/badge/white%20paper-reading%20time%20--%207%20min-9cf?style=flat-square)](https://hackmd.io/@fCsHyW7yR3C5lGQFbh9KdQ/SJzOIt9k3)
+
 Wetware node implementation and client libraries for Go programmers.
 
 ## Installation