[9fans] unicode8.0.0

[erik quanstrom]

if you're running recent 9atom, /lib/unicodedata and
the runepunct and runeclass data may be updated either
by pulling the source or by

        ; cd /sys/src/cmd/runeclass
        ; mk nuke
        ; mk install

i recommend pulling the source as isalpharune(2) and
runeclass(2) have been tweaked to point to the current
standard.

- erik