Change use of global sys.stdout, sys.stdin os.environ to a hgrequest object.
Note: also change hgrequest.write(str(thing)) to hgrequest.write(thing),
people should make sure they write strings.
# repo.py - repository base classes for mercurial
#
# Copyright 2005 Matt Mackall <mpm@selenic.com>
#
# This software may be used and distributed according to the terms
# of the GNU General Public License, incorporated herein by reference.
class RepoError(Exception): pass