shuffile.icn: Program to shuffle lines in a file

   This program writes a version of the input file with the lines
shuffled.  For example, the result of shuffling

                 On the Future!-how it tells
                 Of the rapture that impells
                To the swinging and the ringing
                 Of the bells, bells, bells-
              Of the bells, bells, bells, bells,
                        Bells, bells, bells-
          To the rhyming and the chiming of the bells!

is

          To the rhyming and the chiming of the bells!
                To the swinging and the ringing
                        Bells, bells, bells-
                 Of the bells, bells, bells-
                 On the Future!-how it tells
              Of the bells, bells, bells, bells,
                 Of the rapture that impells

The following options are supported:

     -s i    Set random seed to i; default 0
     -r      Set random seed using randomize(); overrides -s

Limitation:

   This program stores the input file in memory and shuffles pointers to
   the lines; there must be enough memory available to store the entire
   file.