Log Message:
Update to 3.40:

3.40: 2016-09-20
     In repocutter, repair fatal bugs in log and setlog commands.
     In repocutter, added "see" command for reporting repository structure.
     In repocutter, added "sift" command inverting "expunge".

3.39: 2016-09-01
     Make repocutter pathrename and expunge preserve Node-copyfrom-* headers.
     Make pathrename hack Node-copyfrom-path headers as well as Node-path.
     Enable repocutter to handle binary content in blobs.
     Improved documentation for the unite command.

3.38: 2016-08-27
     Fix handling of second argument of timeoffset.
     Allow full find/replace with UTF-8.
     Make the syntax of the 'split' command consistent with the manual.
     Fix buggy 'authors write' command, and add a regression test for it.

3.37: 2016-03-14
     Prevent two potential crash bug introduced by Python 3 porting.

3.36: 2016-03-13
     The repocutter and repomapper utilities are now 8-bit clean under Python 3.
     Reorder 'done' stream terminator after tag and commit creates.
     Fix for GitLab issue #52, crash on a weird unite case.

3.35: 2016-02-25
     Reposurgeon now runs under either Python 2 or 3.
     CVS repos are recognized by CVSROOT, not a (possibly missing) Attic.

3.34: 2016-02-16
     Make repocutter DTRT when copyfrom roots are removed by expunge.

3.33: 2016-02-01
     More work on header-order independence for both reposurgeon and repocutter.

3.32: 2016-01-31
     Handle Subversion dumps as produced by svndumpfilter with Node-kind first.

3.31: 2016-01-23
     repocutter, a tool for preprocessing Subversion repos, is now included.
     In repotool, a new 'branches' command lists branches (not tags).
     Fix repotool, 'tags' for CVS repo so it lists only tags, not branches.
     In repotool, a new 'compare-branches' command compares all branches.
     In repotool, a new 'compare-all' compares tip, tags, and branches.
     repotool no longer needs to run within a module directory for CVS.
     Move from BSD-3-clause to BSD-2-clause, apply SPDX tag.

3.30: 2016-01-10
     Added "when" command for timestamp conversions.
     Fix GitHub issue #42: Repository.split_commit() produces invalid marks.
     Commands now tab-complete name arguments wherever that makes sense.
     Handle format 7 Subversion dumps with sporadic empty nodes.
     Selection sets now remain ordered rather than being sorted.
     There is a new @srt() function to explicitly sort selection sets.
     The reparent command can now specify multiple ancestors.
     In SVN repositories, a tag's subdirectory is now part of its name.