Added the underscore node_module.

node_modules/underscore/modules/where.js

@@ -0,0 +1,8 @@
+import filter from './filter.js';
+import matcher from './matcher.js';
+
+// Convenience version of a common use case of `_.filter`: selecting only
+// objects containing specific `key:value` pairs.
+export default function where(obj, attrs) {
+  return filter(obj, matcher(attrs));
+}