new_contents: from pypushwoosh.client import PushwooshClient
  from pypushwoosh.command import CreateMessageForApplicationCommand
  from pypushwoosh.notification import Notification
  
  AUTH_TOKEN = 'AUTH_TOKEN'
  APPLICATION_CODE = 'APP-CODE'
  
  notification = Notification()
  notification.content = 'Hello world!'
  notification.devices = [
      'PUSH_TOKEN_0',
      'PUSH_TOKEN_1',
  ]
  
  command = CreateMessageForApplicationCommand(notification, APPLICATION_CODE)
  command.auth = AUTH_TOKEN
  
  client = PushwooshClient()
  response = client.invoke(command)
  
subject: add examples dir with first example