Added the underscore node_module.

node_modules/underscore/amd/has.js

@@ -0,0 +1,19 @@
+define(['./_has', './_toPath'], function (_has, _toPath) {
+
+  // Shortcut function for checking if an object has a given property directly on
+  // itself (in other words, not on a prototype). Unlike the internal `has`
+  // function, this public version can also traverse nested properties.
+  function has(obj, path) {
+    path = _toPath(path);
+    var length = path.length;
+    for (var i = 0; i < length; i++) {
+      var key = path[i];
+      if (!_has(obj, key)) return false;
+      obj = obj[key];
+    }
+    return !!length;
+  }
+
+  return has;
+
+});