add gin template (#155)

README.md

@@ -36,3 +36,4 @@ Each author is responsible of maintaining his own code, although if you submit a
 + [xss-mw](https://github.com/dvwright/xss-mw) - XssMw is a middleware designed to "auto remove XSS" from user submitted input
 + [gin-helmet](https://github.com/danielkov/gin-helmet) - Collection of simple security middleware.
 + [gin-jwt-session](https://github.com/ScottHuangZL/gin-jwt-session) - middleware to provide JWT/Session/Flashes, easy to use while also provide options for adjust if necessary. Provide sample too.
++ [gin-template](https://github.com/foolin/gin-template) - Easy and simple to use html/template for gin framework.