commit: lose some pointless 'nothing changed' messages
Move message from localrepo to commands. This drops confusing messages
in subrepo, import, and rebase.
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.