[rfc] Help needed: encodings problems again

[Alexander Belchenko]

Despite that fact that encodings work is landed into bzr.dev there is 
too much places in bzrlib where sys.stdout used directly and therefore 
it create problems with unicode strings when output redirected via pipe 
and sys.stdout hide real encoding of console.

I faced with problems in execution of command

bzr missing | less

when in revisions messages appears russian characters.

When I grep through bzrlib for 'sys.stdout' I have list of about 70 
lines where sys.stdout used. And most of this lines is potentially 
caused problems when output of bzr will be redirected. And this is very sad.

Fixing improper usage of sys.stdout in builtins command is very trivial, 
because we have attribute self.outf in all descendant of Command class. 
But I don't understand how to deal with other places that itself 
unrelated to Command class.

Help needed.

Attached patch solve problems with builtins command. Attached grep 
output showed lines where sys.stdout appears.

--
Alexander
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