Gnulib integration

Applied the following command:

  git submodule add git://git.sv.gnu.org/gnulib.git

This added gnulib in .git/index and created an empty `gnulib'
directory.  This directory contains all the gnulib code, but is not
distributed. gnulib m4 dir are now in `gnulib_m4', while gnulib .c
files are located in `lib'.  `gnulib_m4' and `lib' are generated and
distributed.

* .gitsubmodules: new file.
* src/libs/gnulib: removed.

Minimal Automake support.  Makefile in non-recursive style.

Removed old build system Makefile.*.  Removed various files that are
now generated by the bootstrap script: `configure',
`src/include/config.hin', various helper scripts (`config.guess',
`config.rpath' etc...) that are now installed by in `build-aux'.
Added the minimal code in Makefile.am to build the gnulib.

* Makefile.am: new file (moved and adapted from Makefile.in).
* acinclude.m4: new file (moved from aclocal.m4, which is now generated).
* INSTALL.extra: new file (moved from the original INSTALL file, which
  is now a symlink to gnulib/doc/INSTALL).
* THANKS, AUTHORS: new empty files.
* TESTS: new file to sum up the tests that were done for the Automake
  migration.

1 files changed, 91 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
index 04cf7bf39..c0ce1d442 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,94 @@
+*.[oan]
+*.hpp
+*.output
+*.pdf
+*-s
+.dirstamp
+.deps
 /Makefile
+/Makefile.in
+stamp-*
+/aclocal.m4
+/autom4te.cache
+/build-aux
+/configure
 /config.log
-/config.status
-/stamp-h
+/src/include/stamp-h1
+/font/devpdf/[A-Z]*
+/gnulib_m4
+/INSTALL
+/lib
+/maint.mk
+/src/include/config.hin
+/GNUmakefile
+/README-release
+/addftinfo
+/afmtodit
+/charset.alias
+/chem
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+/contrib/hdtbl/hdtbl.tmac
+/contrib/mom/om.tmac
+/defs.h
+/eqn
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+/font/devpdf/download
+/font/devpdf/enc/
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+/font/devpdf/util/BuildFoundries
+/gdiffmk
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