maint: reorganize the source tree and make it less cluttered

* TODO: Move ...
* old/TODO: ... here.  This is done because this file is quite
outdated, and today TODO and wishlist items are better handled
though the debbugs tracker.
* ChangeLog.00: Move ...
* old/ChangeLog.00: ... here.
* ChangeLog.01: Move ...
* old/ChangeLog.01: ... here.
* ChangeLog.02: Move ...
* old/ChangeLog.02: ... here.
* ChangeLog.03: Move ...
* old/ChangeLog.03: ... here.
* ChangeLog.04: Move ...
* old/ChangeLog.04: ... here.
* ChangeLog.09: Move ...
* old/ChangeLog.09: ... here.
* ChangeLog.11: Move ...
* old/ChangeLog.11: ... here.
* ChangeLog.96: Move ...
* old/ChangeLog.96: ... here.
* ChangeLog.98: Move ...
* old/ChangeLog.98: ... here.
* tests/ChangeLog-old: Move ...
* old/ChangeLog-tests: .. here.
* tests/Makefile.am (EXTRA_DIST): Adjust.
* Makefile.am (EXTRA_DIST): Likewise.
* .autom4te.cfg: New file, instructing the autotools to place the
autom4te cache directory in '.autom4te.cache' rather than in
'autom4te.cache'.
* .gitignore: Adjust.
* Makefile.am (maintainer-clean-local): Remove the '.autom4te.cache'
directory.

Signed-off-by: Stefano Lattarini <stefano.lattarini@gmail.com>

.autom4te.cfg

@@ -0,0 +1,5 @@
+## autom4te.cfg for the Automake package.
+##
+begin-language: "Autoconf-without-aclocal-m4"
+args: --cache=.autom4te.cache
+end-language: "Autoconf-without-aclocal-m4"

.gitignore

@@ -3,7 +3,7 @@ Makefile
 /ChangeLog
 /aclocal.m4
 /configure
-/autom4te.cache
+/.autom4te.cache
 /config.cache
 /config.log
 /config.status

Makefile.am

@@ -31,21 +31,23 @@ AUTOMAKESOURCES = automake.in aclocal.in
 TAGS_FILES = $(AUTOMAKESOURCES)
 
 EXTRA_DIST = \
+  $(AUTOMAKESOURCES) \
+  bootstrap \
   GNUmakefile \
   syntax-checks.mk \
   HACKING \
-  ChangeLog.96 \
-  ChangeLog.98 \
-  ChangeLog.00 \
-  ChangeLog.01 \
-  ChangeLog.02 \
-  ChangeLog.03 \
-  ChangeLog.04 \
-  ChangeLog.09 \
-  ChangeLog.11 \
-  bootstrap \
   $(gitlog_to_changelog_fixes) \
-  $(AUTOMAKESOURCES)
+  old/ChangeLog-tests \
+  old/ChangeLog.96 \
+  old/ChangeLog.98 \
+  old/ChangeLog.00 \
+  old/ChangeLog.01 \
+  old/ChangeLog.02 \
+  old/ChangeLog.03 \
+  old/ChangeLog.04 \
+  old/ChangeLog.09 \
+  old/ChangeLog.11 \
+  old/TODO
 
 ## Make versioned links.  We only run the transform on the root name;
 ## then we make a versioned link with the transformed base name.  This
@@ -107,6 +109,11 @@ recheck:
 	$(am__cd) tests && $(MAKE) $(AM_MAKEFLAGS) $@
 .PHONY: recheck
 
+# We don't use the default name for the autom4te cache directory,
+# so we need this.
+maintainer-clean-local:
+	rm -rf .autom4te.cache
+
 ################################################################
 ##
 ## Everything past here is useful to the maintainer, but probably not

tests/Makefile.am

@@ -28,7 +28,7 @@ TAP_LOG_DRIVER = AM_TAP_AWK='$(AWK)' $(SHELL) $(top_srcdir)/lib/tap-driver.sh
 
 AM_TAP_LOG_DRIVER_FLAGS = --merge
 
-EXTRA_DIST = ax/is ChangeLog-old
+EXTRA_DIST = ax/is
 
 TESTS = ## Will be updated later.