TODO

Android
  * W/PluginManager( 3356): THREAD WARNING: exec() call to Notification.alert blocked the main thread for 39ms. Plugin should use CordovaInterface.getThreadPool().

iOS
  * wait for user to answer permission popup before trying to create notifications
  * 2014-10-17 16:16:04.739 Shelf Elf Reminder[6153:65224] THREAD WARNING: ['Notification'] took '11.066895' ms. Plugin should use a background thread.