Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Recode the colemak keymap to ISO-8859.

I accidently converted the file to Unicode before committing it and
kbdcontrol doesn't like that very much.

Spotted by: ed
Pointy hat to: philip
MFC after: 1 day

Add support for the Colemak keyboard layout from: http://colemak.com/.

# While here, restore alphabetical order in INDEX.keymaps.

Submitted by: Geert Hendrickx <ghen -at- netbsd.org>
MFC after: 1 week