Add node modules and new code for release (#57)

Co-authored-by: taakleton <taakleton@users.noreply.github.com>

node_modules/underscore/amd/isArray.js

@@ -0,0 +1,9 @@
+define(['./_setup', './_tagTester'], function (_setup, _tagTester) {
+
+	// Is a given value an array?
+	// Delegates to ECMA5's native `Array.isArray`.
+	var isArray = _setup.nativeIsArray || _tagTester('Array');
+
+	return isArray;
+
+});