Improve plot comparison scripts. * compare_plot_demos.m: pass toolkits{} to html_compare_plot_demos. Give instructions for toolkit matlab. Fix whitespace issue. * dump_demos.m: fix typo in default dir. Consistently use dump_plot_demos.m for main worker script. Create diary and error messages for inclusion in html page. Set random seed for better comparison. * html_plot_demos_template.html: Allow variable toolkits (removed hard-coded gnuplot, matlab, fltk sequence). Fix some whitespace issues. * html_compare_plot_demos.m: Rewrite docstring. The instructions are no longer needed because compare_plot_demos handles them. Add "toolkits" and column_width param. Dynamically add toolkits in html, add diary.log link.

      subroutine fortransub (n, a, s)
      implicit none
      character*(*) s
      real*8 a(*)
      integer*4 i, n, ioerr
      do i = 1, n
        if (a(i) .eq. 0d0) then
          call xstopx ('fortransub: divide by zero')
        else
          a(i) = 1d0 / a(i)
        endif
      enddo
      write (unit = s, fmt = '(a,i3,a,a)', iostat = ioerr)
     $       'There are ', n,
     $       ' values in the input vector', char(0)
      if (ioerr .ne. 0) then
        call xstopx ('fortransub: error writing string')
      endif
      return
      end