Auto save functionality

• Auto save in progress functionality every minute (similar to Google doc)
•  
  Auto save as draft and logout of a document after 5 minutes of inactivity (to help so that more people can access the same document and not have to track down someone to unlock it)
• Change function to not lock the document if don't close down properly (i.e., save and logout of document if click away or close down window--instead of locking it)

Thanks!