graphics programming

[forsyth@plan9.cs.york.ac.uk forsyth@plan9.cs.york.ac.uk]

it's strange.  i find it much easier to program now
using <libg.h>, <panel.h> and sometimes <layer.h>
than it was even to work through
the manual pages and bugs for <curses.h>, let alone terminfo.
i get a better class of display and interaction, too.

bitmap graphics looks complex if you've been faced with
that shelf of basic X11 manuals, but it's straightforward, really.
i heartily encourage those readers who have been put off until now
to have a go.

for those applications that don't particularly
benefit from fancy graphics, Acme centralises and simplifies the interface
building effort, and encourages a coherence to the interaction.
it even does your `cooked mode' processing for you (and more important
things as well).