Update to 0.19.0
  This release of paexec was successfully tested on the following
  platforms: NetBSD-6.1/amd64, OpenBSD-5.3/i386, FreeBSD-8.3/i386,
  Solaris-10/sparc, Solaris-11/amd64 and diverse Linux/{i386,amd64}.

  paexec is now selfcontained, libmaa is not needed anymore.

  Presentation paexec.pdf was added to presentation/. I hope it will
  help easier understand how "paexec" works. It is installed to
  ${DOCDIR}.

  paexec:
    - POSIX-2008 getline(3) is used for reading lines
      instead of home-made function.
    - t '' is equivalent to "no transport", spaces are trimmed.
    - "-n +NNN" has higher priority than -t, i.e. if they both are
      specified, transport is ignored.
    - Fix for -W1.
    - Environment variable PAEXEC_EOT was introduced.
    - Option -y was added to paexec(1) and paexec_reorder(1).
    - Option -C was added to paexec(1).

  paexec_reorder:
    - Option -x was added to paexec_reorder(1).

  A number of fixes and improvements in regression tests.

(cheusov)