Support for extended color modes on a TTY

[Eli Zaretskii]

I installed today changes that add to Emacs support for 16-color,
88-color, and 256-color versions of xterm.  (If you don't have such
an xterm installed, you can find it at ftp://dickey.his.com/xterm/.)
Please give this a try.

If someone knows about other terminals which have more than the
standard 8 colors, please consider adding support for them using
lisp/ter/xterm.el as an example.

For now, to put those extra colors to good use, you need to manually
frob all of the defface's which define separate defaults for colors on
a tty.  I'm working on a simple extension to defface features that
will allow Emacs to automatically use better defaults for tty's with
many colors (e.g., a 256-color tty should simply use the same default
colors as X).

There's also a better support for rxvt, see lisp/term/rxvt.el.

Enjoy.