Hello Electron

In package.json, define our main entry point for electron, and add a
node script to start it up.

Add main.js from Electron/electron-quick-start with two modifications.
1. Load background.html instead of index.html
2. Disable node integration in the renderer

At this point we can load the background page in a window
with `npm start`, though it currently breaks on missing chrome app APIs.

// FREEBIE

main.js

@@ -0,0 +1,60 @@
+const electron = require('electron')
+// Module to control application life.
+const app = electron.app
+// Module to create native browser window.
+const BrowserWindow = electron.BrowserWindow
+
+const path = require('path')
+const url = require('url')
+
+// Keep a global reference of the window object, if you don't, the window will
+// be closed automatically when the JavaScript object is garbage collected.
+let mainWindow
+
+function createWindow () {
+  // Create the browser window.
+  mainWindow = new BrowserWindow({width: 800, height: 600, webPreferences: {nodeIntegration: false}})
+
+  // and load the index.html of the app.
+  mainWindow.loadURL(url.format({
+    pathname: path.join(__dirname, 'background.html'),
+    protocol: 'file:',
+    slashes: true
+  }))
+
+  // Open the DevTools.
+  mainWindow.webContents.openDevTools()
+
+  // Emitted when the window is closed.
+  mainWindow.on('closed', function () {
+    // Dereference the window object, usually you would store windows
+    // in an array if your app supports multi windows, this is the time
+    // when you should delete the corresponding element.
+    mainWindow = null
+  })
+}
+
+// This method will be called when Electron has finished
+// initialization and is ready to create browser windows.
+// Some APIs can only be used after this event occurs.
+app.on('ready', createWindow)
+
+// Quit when all windows are closed.
+app.on('window-all-closed', function () {
+  // On OS X it is common for applications and their menu bar
+  // to stay active until the user quits explicitly with Cmd + Q
+  if (process.platform !== 'darwin') {
+    app.quit()
+  }
+})
+
+app.on('activate', function () {
+  // On OS X it's common to re-create a window in the app when the
+  // dock icon is clicked and there are no other windows open.
+  if (mainWindow === null) {
+    createWindow()
+  }
+})
+
+// In this file you can include the rest of your app's specific main process
+// code. You can also put them in separate files and require them here.

package.json

@@ -2,6 +2,7 @@
   "name": "signal-desktop",
   "repository": "https://github.com/WhisperSystems/Signal-Desktop.git",
   "version": "0.0.0",
+  "main": "main.js",
   "devDependencies": {
     "bower": "^1.3.12",
     "grunt": "^0.4.5",
@@ -20,6 +21,7 @@
   },
   "scripts": {
     "test": "grunt test",
-    "lint": "grunt jshint"
+    "lint": "grunt jshint",
+    "start": "electron ."
   }
 }