kfiles: older keyed-file definitions, replaced by keyfiles

this script supports keyed file systems.

A keyed file is a J component file in which the components are accessed using keywords.

A keyword may be any character string.

main functions: kcreate kcreate 'dat' create file kdir kdir 'dat' keyword directory kerase kerase 'dat' erase file kread kread 'dat';'key' read data for keyword kwrite data kwrite 'dat';'key' write date for keyword

read: if keyword not found, return '' else return value write: if data='' then keyword is deleted

Name	Type	Description
kcreate	verb	create file
kdir	verb	keyword directory
kerase	verb	erase file
kread	verb	read data for keyword
kwrite	verb	write date for keyword