tags: fix abababa case, with test case

Merge with crew

Make import opportunistically use merge information

Add import --exact. When this option is set, import will apply the patch (which must be generated by export) to the parents specified in the patch, and check that the node produced by the patch matches the node ID in the patch.

Add --outgoing option to patchbomb

restructure changelog file appending - make appending code proper part of changelog with delayupdate/finalize - use simplified appender that tracks pending data in memory - eliminate old appendfile and helper classes - update addchangegroup to use new interface and reuse the existing changelog

appendfile: handle only changelog.i file

appendfile: remove unused manifest code

revlog: simplify revlog version handling - pass the default version as an attribute on the opener - eliminate config option mess

revlog: don't pass datafile as an argument

Merge additional fixes for my matcher changes

glob:<directory> patterns match the files in that directory. This makes the behaviour of glob: patterns more consistent: hg status glob:dir and hg status -I glob:dir will match the same files. It's also consistent with the fact that {rel,}path patterns recursively match the contents of a directory.