Manage redirection in a way similar to Unix
    
    This patch allows remote-viewer to redirect output/error streams to
    files.
    Also if launched from a console program (for instance from the command
    prompt) you are able to see output from the console where you launch
    the program.
    This allow to launch the program with a syntax like:
      > remote-viewer.exe --debug > log.txt 2>&1
    or simply:
      > remote-viewer.exe --debug
    
    Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
    Acked-by: Fabiano Fidêncio <fidencio@redhat.com>