Added the underscore node_module.

node_modules/underscore/modules/isMatch.js

@@ -0,0 +1,13 @@
+import keys from './keys.js';
+
+// Returns whether an object has a given set of `key:value` pairs.
+export default function isMatch(object, attrs) {
+  var _keys = keys(attrs), length = _keys.length;
+  if (object == null) return !length;
+  var obj = Object(object);
+  for (var i = 0; i < length; i++) {
+    var key = _keys[i];
+    if (attrs[key] !== obj[key] || !(key in obj)) return false;
+  }
+  return true;
+}