Added the underscore node_module.

node_modules/underscore/cjs/isArguments.js

@@ -0,0 +1,18 @@
+var _tagTester = require('./_tagTester.js');
+var _has = require('./_has.js');
+
+var isArguments = _tagTester('Arguments');
+
+// Define a fallback version of the method in browsers (ahem, IE < 9), where
+// there isn't any inspectable "Arguments" type.
+(function() {
+  if (!isArguments(arguments)) {
+    isArguments = function(obj) {
+      return _has(obj, 'callee');
+    };
+  }
+}());
+
+var isArguments$1 = isArguments;
+
+module.exports = isArguments$1;