mueval.cabal: mention we only run on 6.10
mueval.cabal: mention we only run on 6.10

Ignore-this: af88ef22aa4b33131f727014707837fb
Hint itself supports 6.8 and 6.10, but our use of Control.OldException
bars us from 6.8.

darcs-hash:20081206184707-f7719-7e263b530c1d6d8de220c9fca2ee14e6b2d08f2d

bitemyapp/mueval,gwern/mueval