add node modules to repo

app/node_modules/path-exists/index.js

@@ -0,0 +1,24 @@
+'use strict';
+var fs = require('fs');
+var Promise = require('pinkie-promise');
+
+module.exports = function (fp) {
+	var fn = typeof fs.access === 'function' ? fs.access : fs.stat;
+
+	return new Promise(function (resolve) {
+		fn(fp, function (err) {
+			resolve(!err);
+		});
+	});
+};
+
+module.exports.sync = function (fp) {
+	var fn = typeof fs.accessSync === 'function' ? fs.accessSync : fs.statSync;
+
+	try {
+		fn(fp);
+		return true;
+	} catch (err) {
+		return false;
+	}
+};