* Makefile.am (aclocal_macros, aclocal_DATA): Removed.

* Makefile.am (aclocal_macros, aclocal_DATA): Removed.
(EXTRA_DIST): Remove m4 macro files; they are automatically
added by automake.
(pkgmacrodir): Where to install libtool macro files.
(pkgmacro_DATA): List installable libtool macro files.
(install-data-local): Remove previous versions of ltdl.m4 and
libtool.m4 from their old location.
* libtoolize.in: Use new pkgmacrodir installed macros when
libtoolizing a project.  Treat libtool.m4 and ltdl.m4 specially,
and func_serial_update() any other files from pkgmacrodir.
(pkgmacrodir): Where to find installed libtool macro files.
(aclocaldir): Removed.
(func_copy_all_files): Add an optional callback parameter to
control how files are copied.  If the callback is passed, don't
tell it whether it can copy or not.
(func_serial): Exchange parameters and make macro_regex optional,
so that this function can be used to extract serial numbers from
files with the traditional /^# serial [1-9][0-9]*$/ syntax.
Changed all callers.
(func_serial_update): Make macro_regex optional last parameter, so
that this function can be used as a callback for
func_copy_all_files().  Changed all callers.
* m4/ltsugar.m4: Add a serial number.