[PATCH 0 of 2] Rewrite log command, get patchbomb working again

[Bryan O'Sullivan]

I rewrote the "hg log" command last night.  Along the way, I got rid of
some pathological behaviour and added some useful features.

Here's the behaviour of old "hg log":

linux-2.6 $ time hg log >/dev/null

real    1m18.673s
user    1m9.455s
sys     0m6.676s

And the new version:

linux-2.6 $ time hg log >/dev/null

real    0m4.970s
user    0m2.885s
sys     0m0.532s

And something you couldn't even do with the old version (and notice how
fast it is):

linux-2.6 $ time hg log net/ipv4 >/dev/null

real    0m4.932s
user    0m2.993s
sys     0m0.521s

Pullable from http://www.serpentine.com/hg
-------------- next part --------------
6 files changed, 33 insertions(+), 13 deletions(-)
MANIFEST.in             |    1 +
Makefile                |    3 +++
contrib/bash_completion |    4 ++--
mercurial/hg.py         |   22 +++++++++++++++-------
mercurial/hgweb.py      |   14 ++++++++++----
tests/test-help.out     |    2 ++