Support FreeWnn.

	modified:   COPYING
	renamed:    jigyosyo.csv -> JIGYOSYO.CSV
	renamed:    ken_all.csv -> KEN_ALL.CSV
	modified:   Makefile
	new file:   Makefile.wnn
	modified:   debian/copyright
	new file:   yu2.PL
	deleted:    yu2can.pl
change wnn-dic's postal-code from ascii to zenkaku

(Free)Wnn can not recognize ascii postal-code.
So changed postal-code from ascii to zenkaku.

	modified:   yu2.PL
support (Free)Wnn dictionary

Merge branch 'fwnnSpike' into mergeSpike

Conflicts:
	COPYING
	debian/copyright

* yu2.PL: renamed from yu2can.pl, supported (Free)Wnn (close #34710)
  Others changes:
  + convert charset encoding between Shift-JIS and EUC-JP.
  + default CSV files name into capital letters from small letters,
    because JAPAN POST Co., Ltd. shows files in capital letters.
    (close #34087)
* Makefile.wnn: created: supported (Free)Wnn
* Makefile: removed nkf, because yu2.PL can convert encoding
* COPYING: modified 2 points:
  + CSV files name into capital letters
  + yubin7.dic: add: (Free)Wnn's dictionary
* debian/copyright: same as COPYING, see COPYING
* README: modified 2 points:
  + added (Free)Wnn
  + modified sentences
* README.eucJP:
* AUTHORS: modified 2 points:
  + renamed CSV files
  + added yu2.PL
* KEN_ALL.CSV: renamed fronm ken_all.csv
* JIGYOSYO.CSV: renamed from jigyosyo.csv
* ChangeLog: added this entry