npm is "smart" enough to try and install our electron wrapper as a module

instead of the actual electron package. With no way to ignore directories.
I'd like to think of this as temporary, until I get to rip apart riot-web
and riot-electron

Signed-off-by: Michael Telatynski <7t3chguy@gmail.com>

electron_app/src/tray.js

@@ -0,0 +1,67 @@
+/*
+Copyright 2017 Karl Glatz <karl@glatz.biz>
+Copyright 2017 OpenMarket Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+const path = require('path');
+const electron = require('electron');
+
+const app = electron.app;
+const Tray = electron.Tray;
+const MenuItem = electron.MenuItem;
+
+let trayIcon = null;
+
+exports.hasTray = function hasTray() {
+    return (trayIcon !== null);
+}
+
+exports.create = function (win, config) {
+    // no trays on darwin
+    if (process.platform === 'darwin' || trayIcon) {
+        return;
+    }
+
+    const toggleWin = function () {
+        if (win.isVisible() && !win.isMinimized()) {
+            win.hide();
+        } else {
+            if (win.isMinimized()) win.restore();
+            if (!win.isVisible()) win.show();
+            win.focus();
+        }
+    };
+
+    const contextMenu = electron.Menu.buildFromTemplate([
+        {
+            label: 'Show/Hide ' + config.brand,
+            click: toggleWin
+        },
+        {
+            type: 'separator'
+        },
+        {
+            label: 'Quit',
+            click: function () {
+                app.quit();
+            }
+        }
+    ]);
+
+    trayIcon = new Tray(config.icon_path);
+    trayIcon.setToolTip(config.brand);
+    trayIcon.setContextMenu(contextMenu);
+    trayIcon.on('click', toggleWin);
+};