net-im/neochat: (and quaternion) update for libquotient 0.7

Quaternion is broken. Although it's the same upstream
people, there is no release compatible with 0.7 yet.
NeoChat does like the newer library. Since Quaternion
is more a proof-of-something client than a shiny tool,
mark it broken for now -- there is some upstream work
to get it to work.