add hero template engine (#1299)

README.md

@@ -893,6 +893,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 * [ego](https://github.com/benbjohnson/ego) - A lightweight templating language that lets you write templates in Go. Templates are translated into Go and compiled.
 * [fasttemplate](https://github.com/valyala/fasttemplate) - Simple and fast template engine. Substitutes template placeholders up to 10x faster than [text/template](http://golang.org/pkg/text/template/).
 * [gofpdf](https://github.com/jung-kurt/gofpdf) - A PDF document generator with high level support for text, drawing and images.
+* [hero](https://github.com/shiyanhui/hero) Hero is a handy, fast and powerful go template engine.
 * [jet](https://github.com/CloudyKit/jet) - Jet template engine
 * [kasia.go](https://github.com/ziutek/kasia.go) - Templating system for HTML and other text documents - go implementation.
 * [mustache](https://github.com/hoisie/mustache) - A Go implementation of the Mustache template language.