[Jprogramming] JHS updated

[Eric Iverson]

Run pacman to get the latest JHS version and restart J.

It is now possible to write simple gui apps (forms) without requiring any
javascript programming. There are 2 new demos that are simple example apps.

jijx menu>tool>demo - lists all demos

   rundemo_jhs_ 16 NB. explore demo 16 - link at bottom of app page opens
source ijs file

   rundemo_jhs_ 15 NB. simpler example

There is a new lab showing some new techniques for drawing to a browser
canvas element.

jijx menu>tour>canvas - run canvas lab