• Add the option of passing a hashref to the constructor, where it is turned into an
  object of the class. See POD under new([$config]) for details.
  This patch to the code and POD includes the new test t/08.constructor.t.
  The patch was provided by D Hauke, with thanx.
  
• Move test.conf back into t/, where it was years ago, before someone tried to remove
  all uses of File::Spec. But since File::Spec is used often now, there is no point
  in keeping test.conf in the root directory of the distro.