Minor improvements for Gibbs models.

   anova.ppm.R
   anova.ppm.Rd
      Can now reconcile models fitted using different dummy points, 'rbord' etc.
      New argument 'warn' to suppress warnings.

   fii.R
   mpl.R
   pairwise.family.R
       plot(fitin(ppm(....))) now shows the name of the unit of length.

  NEWS
  DESCRIPTION
    updated.