Added the underscore node_module.

node_modules/underscore/amd/pick.js

@@ -0,0 +1,25 @@
+define(['./restArguments', './isFunction', './_optimizeCb', './allKeys', './_keyInObj', './_flatten'], function (restArguments, isFunction, _optimizeCb, allKeys, _keyInObj, _flatten) {
+
+  // Return a copy of the object only containing the allowed properties.
+  var pick = restArguments(function(obj, keys) {
+    var result = {}, iteratee = keys[0];
+    if (obj == null) return result;
+    if (isFunction(iteratee)) {
+      if (keys.length > 1) iteratee = _optimizeCb(iteratee, keys[1]);
+      keys = allKeys(obj);
+    } else {
+      iteratee = _keyInObj;
+      keys = _flatten(keys, false, false);
+      obj = Object(obj);
+    }
+    for (var i = 0, length = keys.length; i < length; i++) {
+      var key = keys[i];
+      var value = obj[key];
+      if (iteratee(value, key, obj)) result[key] = value;
+    }
+    return result;
+  });
+
+  return pick;
+
+});