Update to 1.16

Upstream Changes:
1.16    2012-08-06      Florent Angly <florent.angly@gmail.com>
    * Fixed issue introduced in version 1.15 where rand() took no notice of
      argument and irand() did (bug #78200, reported by David Morel)
    * Migration of test suite to Test::More and Test::Number::Delta

1.15    2012-06-04      Florent Angly <florent.angly@gmail.com>
    * Implemented irand() to draw random integers (bug #73298, feature requested
      by crew@cs.stanford.edu)
    * Fixed build failure on Hurd (bug #74165, reported and patched by Salvatore
      Bonaccorso)

1.14    2012-05-27      Florent Angly <florent.angly@gmail.com>
    * Fixed compilation problems with nmake on Windows platforms
      (Florent Angly, bug #74984)
    * Fixed issues with random seed (bug #77343, solution suggested by
      Laurent Dami, fix implemented by Florent Angly)

1.13    2012-01-20      Abhijit Menon-Sen <ams@toroid.org>
    * New seed generation and retrieval mechanism by Florent Angly (bug
      #64640 on rt.cpan.org).

(wen)