Replace Ember app with Mithril app

js/lib/utils/computed.js

@@ -0,0 +1,22 @@
+export default function computed() {
+  var args = [].slice.apply(arguments);
+  var keys = args.slice(0, -1);
+  var compute = args.slice(-1)[0];
+
+  var values = {};
+  var computed;
+  return function() {
+    var recompute = false;
+    keys.forEach(function(key) {
+      var value = typeof this[key] === 'function' ? this[key]() : this[key];
+      if (values[key] !== value) {
+        recompute = true;
+        values[key] = value;
+      }
+    }.bind(this));
+    if (recompute) {
+      computed = compute.apply(this, keys.map((key) => values[key]));
+    }
+    return computed;
+  }
+};