chore(app): make multi-repo and build using electron-builder

Related to #787

.eslintignore

@@ -1,3 +1,4 @@
+app/node_modules/
 client/node_modules/
 distro/
 docs/

app/dev.js

@@ -0,0 +1,34 @@
+'use strict';
+
+var getAppVersion = require('./util/get-version');
+
+var app = require('./lib');
+
+app.developmentMode = true;
+
+app.version = getAppVersion(require('./package'), {
+  nightly: 'dev'
+});
+
+
+if (!global.metaData) {
+  global.metaData = {};
+}
+
+global.metaData.version = app.version;
+
+// make sure the app quits and does not hang
+app.on('before-quit', function() {
+  app.exit(0);
+});
+
+app.on('app:window-created', function() {
+  app.menu.rebuild();
+});
+
+try {
+  require('electron-reloader')(module);
+} catch (err) {
+  console.log(err);
+  // ignore it
+}

app/lib/index.js

@@ -43,7 +43,7 @@ Platform.create(process.platform, app, config);
 // variable for developing (reloading and devtools toggling)
 app.developmentMode = false;
 
-app.version = require('../../package').version;
+app.version = require('../package').version;
 app.name = 'Camunda Modeler';
 
 // this is shared variable between main and renderer processes
@@ -356,16 +356,22 @@ app.on('web-contents-created', (event, webContents) => {
  */
 app.createEditorWindow = function() {
 
-  var mainWindow = app.mainWindow = new BrowserWindow({
+  var windowOptions = {
     resizable: true,
     title: 'Camunda Modeler'
-  });
+  };
+
+  if (process.platform === 'linux') {
+    windowOptions.icon = path.join(__dirname + '/../resources/favicon.png');
+  }
+
+  var mainWindow = app.mainWindow = new BrowserWindow(windowOptions);
 
   dialog.setActiveWindow(mainWindow);
 
   mainWindow.maximize();
 
-  mainWindow.loadURL('file://' + path.resolve(__dirname + '/../../public/index.html'));
+  mainWindow.loadURL('file://' + path.resolve(__dirname + '/../public/index.html'));
 
 
   // handling case when user clicks on window close button