title: VS2015 Typescript compile to single file on save not working
body: <p>I have trouble with VS 2015 and Typescript compile on save. If I enable combine all outputs into one file that output file will not be updated on save. During build the file gets updated correctly.
  Some times there is an error message in the status bar which states the .map file can't be written.
  If i disable the one file option compile on save is working.<br><br>Is there any option to enable some logging so I could figure out what is going wrong?</p>
  
  <p><strong>Update:</strong>
  I was able to reproduce this with a new clean Project and also on another PC of a collegue with a completeely different existing project. So this seems to be a general bug.</p>