Tweaked ppm output and plot(fitin(model)) is now possible for some
higher-order interactions.

   ppmclass.R
   summary.ppm.R
      print.ppm and print.summary.ppm will now display
      'Log intensity:' or 'Log trend:' instead of 'Trend formula:'

   fii.R
   areainter.R
   geyer.R
   fitin.Rd
      plot(fitin(model)) is now possible for some higher-order interactions.

   NEWS
   DESCRIPTION
    updated.
    Temporary version number: 1.39-1.021