change terminal modes, and perform non-blocking reads
This module, ReadKey, provides ioctl control for terminals and Win32
consoles so the input modes can be changed (thus allowing reads of
a single character at a time), and also provides non-blocking reads
of stdin, as well as several other terminal related features,
including retrieval/modification of the screen size, and
retrieval/modification of the control characters.

Maintainer: The OpenBSD ports mailing-list <ports@openbsd.org>

WWW: http://search.cpan.org/dist/TermReadKey/
