Add Google Webfonts Helper

Author: alinnert

src/links.json

@@ -940,6 +940,11 @@
           "searchUrl": "https://fonts.google.com/?query={search}",
           "searchConcat": "+"
         },
+        {
+          "title": "Google Webfonts Helper",
+          "url": "https://google-webfonts-helper.herokuapp.com",
+          "description": "A web service that helps to self-host fonts from Google Fonts"
+        },
         {
           "title": "Coding Fonts",
           "url": "https://coding-fonts.css-tricks.com",