Add consul tool, official website

README.md

@@ -696,6 +696,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 
 * [algernon](https://github.com/xyproto/algernon) - HTTP/2 web server with built-in support for Lua, Markdown, GCSS and Amber.
 * [Caddy](https://github.com/mholt/caddy) - Caddy is an alternative, HTTP/2 web server that's easy to configure and use.
+* [consul](https://www.consul.io/) - Consul is a tool for service discovery, monitoring and configuration.
 * [devd](https://github.com/cortesi/devd) - A local webserver for developers
 * [etcd](https://github.com/coreos/etcd) - A highly-available key value store for shared configuration and service discovery.
 * [nsq](http://nsq.io/) - A realtime distributed messaging platform