jfiles.ijs
==========
This script contains definitions for the J component file system.

main functions:
   jcreate        jcreate 'dat'
   jappend        (<i.2 3) jappend 'dat'
   jdup           'new' jdup 'dat'
   jerase         jerase 'dat'
   jread          jread 'dat';2
   jreplace       ('new value';123) jreplace 'dat';2 5
   jsize          jsize 'dat'
