go get -u flag

That way lazy people (like myself) can go get their updates by copy pasting

Author: markus-wa

README.md

@@ -17,7 +17,7 @@ There are also [some other rooms](https://gitter.im/csgodemos) available around
 
 ## Go Get
 
-	go get github.com/markus-wa/demoinfocs-golang
+	go get -u github.com/markus-wa/demoinfocs-golang
 
 ## Example