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6th chunk of `Documentation/RelNotes/1.5.0.adoc`
b0b4935ddfe23a2252027b71d6782dd7e8b14b12d1f3cdda000000010000086b
 it is also included as contrib/blameview.

 - git-blame starts annotating from the working tree by default.


* Less external dependency

 - We no longer require the "merge" program from the RCS suite.
   All 3-way file-level merges are now done internally.

 - The original implementation of git-merge-recursive which was
   in Python has been removed; we have a C implementation of it
   now.

 - git-shortlog is no longer a Perl script.  It no longer
   requires output piped from git-log; it can accept revision
   parameters directly on the command line.


* I18n

 - We have always encouraged the commit message to be encoded in
   UTF-8, but the users are allowed to use legacy encoding as
   appropriate for their projects.  This will continue to be the
   case.  However, a non UTF-8 commit encoding _must_ be
   explicitly set with i18n.commitencoding in the repository
   where a commit is made; otherwise git-commit-tree will
   complain if the log message does not look like a valid UTF-8
   string.

 - The value of i18n.commitencoding in the originating
   repository is recorded in the commit object on the "encoding"
   header, if it is not UTF-8.  git-log and friends notice this,
   and re-encodes the message to the log output encoding when
   displaying, if they are different.  The log output encoding
   is determined by "git log --encoding=<encoding>",
   i18n.logoutputencoding configuration, or i18n.commitencoding
   configuration, in the decreasing order of preference, and
   defaults to UTF-8.

 - Tools for e-mailed patch application now default to -u
   behavior; i.e. it always re-codes from the e-mailed encoding
   to the encoding specified with i18n.commitencoding.  This
   unfortunately forces projects that have happily been using a
   legacy encoding without setting i18n.commitencoding to set
   the configuration, but taken with other improvement, please
   excuse us for this very minor one-time inconvenience.


* e-mailed patches

 - See the above I18n section.

 - git-format-patch now enables --binary without being asked.
   git-am does _not_ default to it, as sending binary patch via
   e-mail is unusual
Title: GIT Updates: Reduced Dependencies, I18n, and Patch Handling
Summary
This update reduces external dependencies by removing the need for the 'merge' program and implementing git-merge-recursive in C, improves internationalization support with UTF-8 encoding, and enhances e-mailed patch application and formatting with default encoding settings and binary patch handling.