cart adding fixed, added a reviews section

frontend/style/node_modules/d3-interpolate/src/hue.js

@@ -0,0 +1,9 @@
+import {hue} from "./color.js";
+
+export default function(a, b) {
+  var i = hue(+a, +b);
+  return function(t) {
+    var x = i(t);
+    return x - 360 * Math.floor(x / 360);
+  };
+}