fix pod2man doesn't through non ASCII [nkf-bug#32546]

https://sourceforge.jp/ticket/browse.php?group_id=248&tid=32546
add LDFLAGS [nkf-bug#32639]

http://sourceforge.jp/ticket/browse.php?group_id=248&tid=32639
Split install into -main, -man, -man-ja [nkf-bug#34250]

http://sourceforge.jp/ticket/browse.php?group_id=248&tid=34250