[PATCH 0 of 15] Change several commands over to using walk interface

[Bryan O'Sullivan]

This patch series converts a number of commands over to using the
dirstate and repo walk interfaces.  It also contains a small number
of fixes for bugs that I found along the way.

Rather than try to apply them by hand (you'll have to fix up some merges),
please pull from http://www.serpentine.com/hg

Thanks,

	<b
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5 files changed, 428 insertions(+), 233 deletions(-)
doc/hg.1.txt          |   85 ++++++++++--
mercurial/commands.py |  324 ++++++++++++++++++++++++++-----------------------
mercurial/hg.py       |  184 +++++++++++++++++----------
mercurial/util.py     |   50 +++++++
tests/test-help.out   |   18 ++