Don't ignore some files for distributing

Remove following files from .gitignore
  configure
  Makefile.in
  missing
  install-sh
Create "configure", "Makefile.in", "install-sh" and "missing"

Run following commands;
  aclocal
  autoconf
  automake -ac

GNU Automake version is 1.14.1
GNU Autoconf version is 2.69

s2