Added the underscore node_module.

node_modules/underscore/amd/each.js

@@ -0,0 +1,25 @@
+define(['./_optimizeCb', './_isArrayLike', './keys'], function (_optimizeCb, _isArrayLike, keys) {
+
+  // The cornerstone for collection functions, an `each`
+  // implementation, aka `forEach`.
+  // Handles raw objects in addition to array-likes. Treats all
+  // sparse array-likes as if they were dense.
+  function each(obj, iteratee, context) {
+    iteratee = _optimizeCb(iteratee, context);
+    var i, length;
+    if (_isArrayLike(obj)) {
+      for (i = 0, length = obj.length; i < length; i++) {
+        iteratee(obj[i], i, obj);
+      }
+    } else {
+      var _keys = keys(obj);
+      for (i = 0, length = _keys.length; i < length; i++) {
+        iteratee(obj[_keys[i]], _keys[i], obj);
+      }
+    }
+    return obj;
+  }
+
+  return each;
+
+});