What's in git.git (stable)

We would need PerlIO fix for git-svn to handle symlinks on MacOS properly on 'maint', which is still a known issue. With that I'll do a v1.5.1.3.

In addition to a few more new features recently discussed, and of course a lot of fixes that came in the last couple of days, I've merged the "give them rope" conversion series to 'master'. Hopefully we will have a handful user-manual updates from JBF and git-gui 0.6.6 from Shawn and have v1.5.2-rc1 soon.

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

 Adam Roben (1):
  git-svn: Added 'find-rev' command

 Johannes Schindelin (1):
  import-tars: be nice to wrong directory modes

 Josh Triplett (1):
  Add missing reference to GIT_COMMITTER_DATE in git-commit-tree documentation

 Julian Phillips (1):
  http.c: Fix problem with repeated calls of http_init

 Junio C Hamano (3):
  Do not barf on too long action description
  Update .mailmap with "Michael"
  Fix import-tars fix.

 Michele Ballabio (1):
  git shortlog documentation: add long options and fix a typo

 Shawn O. Pearce (2):
  Don't allow empty pathnames in fast-import
  Catch empty pathnames in trees during fsck

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

 Josh Triplett (1):
  Fall back to $EMAIL for missing GIT_AUTHOR_EMAIL and GIT_COMMITTER_EMAIL

 Junio C Hamano (7):
  Add 'ident' conversion.
  Add 'filter' attribute and external filter driver definition.
  blame -s: suppress author name and time.
  Split out mailmap handling out of shortlog
  Apply mailmap in git-blame output.
  Make macros to prevent double-inclusion in headers consistent.
  Make sure test-genrandom and test-chmtime are builtas part of the main build.