What's in git.git (stable)

I've done release 1.5.1.5, which hopefully would be the second from the last release in 1.5.1 maintenance series (I somehow ended up missing documentation formatting updates from Matthias Kestenholz, which fix longstanding ugly formatting mistakes in some manual pages).

The tip of 'master' will be tagged v1.5.2 hopefully in 24 hours. Nothing earth shattering since the last message of this series.

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* The 'maint' branch has these fixes since the last announcement.

 J. Bruce Fields (10):
  user-manual: revise birdseye-view chapter
  glossary: expand and clarify some definitions, prune cross-references
  user-manual: move quick-start to an appendix
  Documentation: remove howto's now incorporated into manual
  user-manual: move howto/make-dist.txt into user manual
  user-manual: move howto/using-topic-branches into manual
  user-manual: add a "counting commits" example
  user-manual: introduce git
  user-manual: listing commits reachable from some refs not others
  user-manual: reorganize public git repo discussion

 Johannes Schindelin (1):
  Add a birdview-on-the-source-code section to the user manual

 Junio C Hamano (1):
  GIT v1.5.1.5

 Matthias Kestenholz (2):
  Documentation: Added [verse] to SYNOPSIS where necessary
  Documentation: Reformatted SYNOPSIS for several commands

 Michael Hendricks (2):
  git-send-email: allow leading white space on mutt aliases
  Document core.excludesfile for git-add

 Petr Baudis (1):
  Documentation: git-rev-list's "patterns"

* The 'master' branch has these since the last announcement
  in addition to the above.

 Andy Parkins (1):
  Fix crlf attribute handling to match documentation

 Jakub Narebski (2):
  gitweb: Fix error in git_patchset_body for deletion in merge commit
  gitweb: Fix "Use of uninitialized value" warning in git_feed

 Junio C Hamano (3):
  gitweb: fix another use of undefined value
  Add link to 1.5.1.5 release notes.
  Documentation/git.txt: Update links to older documentation pages.

 Petr Baudis (4):
  gitweb: Normalize searchbar font size
  gitweb: Add support for grep searches
  gitweb: Allow arbitrary strings to be dug with pickaxe
  gitweb: Remove redundant $searchtype setup

 René Scharfe (1):
  git-archive: convert archive entries like checkouts do

 Shawn O. Pearce (1):
  git-gui: Gracefully handle bad TCL_PATH at compile time

 Steffen Prohaska (1):
  Optimized cvsexportcommit: calling 'cvs status' once instead of once per touched file.