i18n-pt_BR: translate 'changeset' like 'revision'
On Mercurial, 'changeset' and 'revision' may be used
interchangeably, but the first is more or less
untranslatable to a single word.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://mercurial.selenic.com/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.