[RESEND PATCH 0/9] Make git-svn fetch ~1.7x faster

This is a resend of my previous patch series to speed up git-svn, taking into
account comments from Eric, Johannes, and Brian.

--
 Documentation/git-cat-file.txt    |    6 +-
 Documentation/git-hash-object.txt |    5 +-
 builtin-cat-file.c                |   87 +++++++++++++++++----
 git-svn.perl                      |   40 +++++-----
 hash-object.c                     |   29 +++++++-
 perl/Git.pm                       |  153 ++++++++++++++++++++++++++++++++++++-
 t/t1005-cat-file.sh               |  126 ++++++++++++++++++++++++++++++
 t/t1006-hash-object.sh            |   49 ++++++++++++
 8 files changed, 452 insertions(+), 43 deletions(-)