You can already do that with Google Docs. https://support.google.com/docs/bin/answer.py?hl=en&answer=1047043 https://support.google.com/docs/bin/answer.py?hl=e

You can already do that with Google Docs. https://support.google.com/docs/bin/answer.py?hl=en&answer=1047043 https://support.google.com/docs/bin/answer.py?hl=en&answ...