add sass/scratch.scss and associated sass files

Resources/public/sass/contrib/bourbon/css3/_font-face.scss

@@ -0,0 +1,24 @@
+@mixin font-face(
+  $font-family,
+  $file-path,
+  $weight: normal,
+  $style: normal,
+  $asset-pipeline: $asset-pipeline,
+  $file-formats: eot woff2 woff ttf svg) {
+
+  $font-url-prefix: font-url-prefixer($asset-pipeline);
+
+  @font-face {
+    font-family: $font-family;
+    font-style: $style;
+    font-weight: $weight;
+
+    src: font-source-declaration(
+      $font-family,
+      $file-path,
+      $asset-pipeline,
+      $file-formats,
+      $font-url-prefix
+    );
+  }
+}