Make revlog constructor more discerning in its treatment of errors.

Clean up date and timezone handling. We used to pass changelog dates around as a "unixtime timezone" string containing a pair of encoded ints. Now, they get passed around as a (unixtime, timezone) tuple of numbers, which makes much more sense.

Fix up representation of dates in hgweb. Date display is now uniform both on the command line and via the web interface.

Fix behaviour of commit. It's now a fatal error if the option to --logfile isn't readable. Ditto if both --message and --logfile are specified.

Unify display of dates. We now use one function, commands.datestr, to display dates, instead of calling time.asctime in inconsistent ways.

Print commit time/date from perspective of committer. Previously, it was printed in the time zone of the reader, but with the committer's time zone offset. It is now consistent.

Hook fixups Pass the first new changeset node to the changegroup hook Call commit for each changeset in a pull changegroup Improve hook docs

Fix setting of hg default when using --pull on clone of local repository.

Fix default clone destination The default clone wasn't working: $ hg clone hg abort: repository hg/.hg not found! This was because we were creating the destination directory from the default, then checking whether it existed to determine whether to expand the path.

Fix traceback during invalid rev identifier for debugdata