Merge branch '1.3.x'

* 1.3.x:
  Release 1.3.15.
  mdwsetup.py: Adjust exit status from `subprocess'.
  mdwsetup.py: Fix unbound variable reference in error case.
  mdwsetup.py: Add missing `OS.' qualifier on `W...' calls.
  texinice.tex: Cope with new names for page-dimension registers.
  Makefile.am:  Tweak `silent-rules' machinery.
  auto-version.in: Don't insist that `.git' is a directory.