更新前端静态网页获取方式，放弃使用后端获取api

frontend/node_modules/underscore/amd/now.js

@@ -0,0 +1,10 @@
+define(function () {
+
+  // A (possibly faster) way to get the current timestamp as an integer.
+  var now = Date.now || function() {
+    return new Date().getTime();
+  };
+
+  return now;
+
+});