title: TFS2013 Checkin Notification: Can I change context on files before checking in
body: <p>I'm making a check in Notification where I need to change the files before checking them in and Merge on TFS server 2013.</p>
  
  <p>So I think if I could download the data stream on the server, make the changes and then upload them to TFS.</p>
  
  <p>Do any of you know if this is possible?</p>