2002-05-19 	
	* local zen->han procedure (ZENKAKU to HANKAKU conversion) added
	to jcccf:convert with corresponding modifications in jcccf:convert
	and in jcccf:cv.
	* jcccf:cp procedure duly removed.
	* erroneous codes removed from jcccf:cv	
	* version number raised to 2.1
2000-01-22
	* han->zen
	(or (= c (vector-ref hankana i))(>= i (vector-length hankana)))
	->(or (>= i (vector-length hankana))(= c (vector-ref hankana i))
1999-12-23
	* jcccf:judge-file -> judge-file
	Procedure name changed.  
	Description in 'Main procedures' in *.texi files.
	* *.texi files
	rewritten using @deffn.
1999-12-19 
	* arguments of cv-file 
	(cv-file input output from-code to-code remove-cr add-cr
 	check-length) 
	-> (cv-file input output from-code to-code . options)
	if no options, remove-cr defaults to #t, add-cr defaults to #f 
	and check-length 5000.
	*procedure cv renamed to jfilter:cv
	* *.texi files,	section Code Conversion Filters 
	split into two secions, one for code conversion primitives and
 	service procedures and one for jfilter main procedures.
1999-12-09
	* procedure cv-string
	default value for add-cr is #f.
	* procedure cv-file API
	default values are specified with #f too. () is not boolean with Scheme.
	* jcccf:cp, cv-file
	close-port inport -> close-input-port inport
	close-port outport -> close-output-port outport
1999-12-06
	* procedure cv
	(euqla? cur-sequence ccf:roman)->(equal? cur-sequence jcccf:roman)
	* constants and procedure names changed from ccf:* to jcccf:*
	* program name changed from ccf.scm to jfilter.scm
	* *.texi files changed accordingly.