[RFC PATCH v3 00/13] example implementation of revwalk tutorial

Since v2, mostly reworded comments, plus fixed the issues mentioned in the tutorial itself. Thanks Eric for the review.

Emily Shaffer (13):
  walken: add infrastructure for revwalk demo
  walken: add usage to enable -h
  walken: add placeholder to initialize defaults
  walken: add handler to git_config
  walken: configure rev_info and prepare for walk
  walken: perform our basic revision walk
  walken: filter for authors from gmail address
  walken: demonstrate various topographical sorts
  walken: demonstrate reversing a revision walk list
  walken: add unfiltered object walk from HEAD
  walken: add filtered object walk
  walken: count omitted objects
  walken: reverse the object walk order

 Makefile         |   1 +
 builtin.h        |   1 +
 builtin/walken.c | 297 +++++++++++++++++++++++++++++++++++++++++++++++
 git.c            |   1 +
 4 files changed, 300 insertions(+)
 create mode 100644 builtin/walken.c