* Makefile.am: Add LIBICONV to windres.

* Makefile.am: Add LIBICONV to windres.
* acinclude.m4: Added missing "lib-*.m4" and "lt*.m4" files.
* configure.in: Add AC_CHECK_HEADER for iconv.h and use AM_ICONV.
* config.in: Add ICONV defines.
* aclocal: Regenerate.
* confugure: Regenerate.
* winduni.c: (local_iconv_map codepages, wind_language_t, languages, unicode_is$
  (ascii_from_unicode): Use codepage_from_unicode.
  (ascii_from_unicode): Use unicode_from_codepage.
  Use for cygwin windows API for unicode transformation.
* winduni.h: (CP_ACP, CP_UTF7, CP_UTF8, CP_OEM, CP_UTF16): New macros.
  (wind_language_t, local_iconv_map): New types.
  (wind_find_language_by_id, wind_find_language_by_codepage,
  (unicode_is_valid_codepage, wind_find_codepage_info, unicode_from_codepage, c$