extdiff: made it less chatty in non-verbose mode
Made the status info only display in verbose mode since most hg commands aren't so chatty. This also makes it cleaner for other extensions to call extdiff.
Basic install:
$ make # see install targets
$ make install # do a system-wide install
$ hg debuginstall # sanity-check setup
$ hg # see help
See http://www.selenic.com/mercurial/ for detailed installation
instructions, platform-specific notes, and Mercurial user information.