title: R shiny app doesn't print to console
body: <p>I am implementing an R shiny application. I am using cat and print to write to the console and be able to see what is going on.</p>
  
  <p>In the server.R I have some calls to cat before the shinyServer function and they work well.
  I have though other calls to cat inside shinyServer and their content is not printed although the code is executed, I see the output in the web UI, they are in a reactive block. 
  The UI.R uses a submitButton in case this makes a difference.</p>
  
  <p>As far as I have read, cat should send to console unless redirected, what I am not doing.
  I am also using cat with file="" and file=stdout() to try avoid any redirection.</p>
  
  <p>If I run the app from a shortcut on the console that gets open the situation is the same.
  Any ideas on what can be happening?</p>
  
  <p>I use R 3.1.1 and R studio 0.98 in Windows 7.</p>