add node modules to repo

app/node_modules/electron-is-accelerator/README.md

@@ -0,0 +1,25 @@
+# electron-is-accelerator
+
+Check if a string is a valid [Electron accelerator](https://github.com/electron/electron/blob/master/docs/api/accelerator.md) and return a boolean. This module can be used to validate user defined accelerators before using them with [MenuItems](http://electron.atom.io/docs/api/menu-item/).
+
+## Installation
+
+```
+$ npm install --save electron-is-accelerator
+```
+
+## Usage
+
+```javascript
+var isAccelerator = require("electron-is-accelerator");
+
+isAccelerator("CommandOrControl+Shift+Z"); // true
+isAccelerator("CommandOrControl+F9"); // true
+isAccelerator("CommandOrContrl+F9"); // false
+isAccelerator("A+Z"); // false
+```
+
+## License
+
+The MIT License (MIT)
+Copyright (c) 2016 Thomas Brouard