[Qt-creator] Automatic change logs via git

[Robert Caldecott]

While looking at the Qt Creator 2.2 beta change log I realised it had
been generated automatically with a git log command (git log
--cherry-pick --pretty=oneline origin/master...origin/2.1).  However,
it seems to include Windows, Mac, C++, etc. 'sections'?  How do you
guys do this?  What format do your commit messages have to be in to
generate decent looking change logs?  I want to rip this idea off for
my own git-based projects!

Regards.