docs: update readme for multiple template package. (#786)

README.md

@@ -621,6 +621,9 @@ func main() {
 }
 ```
 
+### Multitemplate
+
+Gin allow by default use only one html.Template. Check [a multitemplate render](https://github.com/gin-contrib/multitemplate) for using features like go 1.6 `block template`.
 
 ### Redirects