README: rel=external

Author: markus-wa

README.md

@@ -1,6 +1,6 @@
 # demoinfocs-golang - A CS:GO Demo Parser
 
-Is a Go library for super fast parsing and analysing of Counter Strike: Global Offensive (CS:GO) demos (aka replays). It is based on [Valve's demoinfogo](https://github.com/ValveSoftware/csgo-demoinfo) and [SatsHelix's demoinfo](https://github.com/StatsHelix/demoinfo).
+Is a Go library for super fast parsing and analysing of Counter Strike: Global Offensive (CS:GO) demos (aka replays). It is based on <a href="https://github.com/ValveSoftware/csgo-demoinfo" rel="external">Valve's demoinfogo</a> and <a href="https://github.com/StatsHelix/demoinfo" rel="external">SatsHelix's demoinfo</a>.
 
 [![GoDoc](https://godoc.org/github.com/markus-wa/demoinfocs-golang?status.svg)](https://godoc.org/github.com/markus-wa/demoinfocs-golang)
 [![Build Status](https://travis-ci.org/markus-wa/demoinfocs-golang.svg?branch=master)](https://travis-ci.org/markus-wa/demoinfocs-golang)