Add ability to import & export article source code as a .xml or .txt file

We frequently send articles to an outside vendor for translations. Currently, we must copy & paste the source code into a text file, send to our vendor, receive it back, and re-paste it into Zendesk. 

It would save us loads of time if we could select several articles at once and export their source code into a .txt or .xml file. A similar feature could allow us to re-import the translated source code once we receive it back.

Thank you!