Add AddDate to functions list

content/functions/adddate.md

@@ -0,0 +1,20 @@
+---
+title: adddate
+linktitle: AddDate
+description: Returns the time corresponding to adding the given number of years, months, and days passed to the function.
+godocref: https://golang.org/pkg/time/#Time.AddDate
+date: 2017-02-01
+publishdate: 2017-02-01
+lastmod: 2017-02-01
+categories: [functions]
+tags: [dates,time]
+signature:
+workson: []
+hugoversion:
+relatedfuncs: [now]
+deprecated: false
+aliases: []
+---
+
+<!-- Look to example in docs site here: https://github.com/spf13/hugo/blob/master/docs/layouts/index.html--e.g., can be paired with now and where -->
+