rename configure.in -> configure.ac because of warnings during autoreconf
eliminate some autoconf/automake warnings
autoreconf does the job of all these tools now.

autogen.sh can probably be removed, but it serves as a good remind
as to which command needs to be run.
Fix configure script.
Generate a ChangeLog file from the Git history.

This is a first attempt at producing something. I wanted to do it
without relying on an external tool since there doesn't seem to be a
readily packaged one (like cvs2cl). This output looks near enough to
the proper ChangeLog format to suffice.
Update configure.ac with changes from autoupdate.
enforce manual pages building for maintainers
remove -Werror until I fixed gettext stuff ('warning: The 'AM_PROG_MKDIR_P' macro is deprecated, and will soon be removed.' is caused by gettext's m4 files)
fix forgotten renaming action (run_tests.pl.in -> run_tests.t.in)
renaming acx_*.m4 -> ax_*.m4
- rename ACX_* macros into AX_*
- remove gettext stuff for library name stubs (doing own ...)
reintroduce -Werror automake flag
Add testlib.h header to dist.
Looks like sys/timeb.h isn't used.
Various cleanups and corrects of manual pages.
Put the correct date in manual pages.
Check for termios.h and sys/termios.h headers.
check for termios.h headers only when building saidar
Add .gitignore file.
ignore DEVSTAT_TYPE_PASS flag - dev must have a type anyway