title: streaming page results in scalatra / unfiltered
body: <p>when writing a CGI script or a basic servlet you can send part of the response to the client before the entire response has been generated.  This is advantageous when, for example, performing a large SQL query and displaying the results in an HTML table.  Showing the results as they come in makes the application much more responsive.  Is this possible in a basic REST framework like Scalatra or Unfiltered--where the return value is often the response text?</p>