Set badge count

This is displayed on the launcher icon on linux/mac

// FREEBIE

main.js

@@ -173,3 +173,7 @@ app.on('activate', function () {
 
 // 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.
+
+ipc.on('set-badge-count', function(event, count) {
+  app.setBadgeCount(count);
+});