Add Capital Go conference.
A Go conference in Washington, D.C., USA. Next one is on April 24-25.
@@ -1489,6 +1489,7 @@ Where to discover new Go libraries.
## Conferences
+* [Capital Go](http://www.capitalgolang.com) - Washington, D.C., USA
* [dotGo](http://www.dotgo.eu) - Paris, France
* [GoCon](http://gocon.connpass.com/) - Tokyo, Japan
* [GolangUK](http://golanguk.com/) - London, UK
