Add revlog.reachable to find a graph of ancestors for a given rev

[PATCH] raise exceptions with Exception subclasses Fixed the patch. Using Exception subclasses. (tweaked by mpm)

Fixes for push corner case TAH found a bug where push would push things the remote already had, raising an assertion. This turned out to be because the changeset protocol was not recording a common subset node in one case. Also discovered was that the protocol was queueing multiple copies of a node for pull. Fixed by changing fetch to a hash. Add some more debugging output.

Add support for extension modules This adds support for an [extensions] section to hgrc. This has the form of: [extensions] mod=[path] If a path is specified, the python module found at that path is load. Otherwise, __import__ is used to find the module. Each module must implement a dict called cmdtable where the command line options for that module live. Each module must also implement a reposetup function: cmdtable = {} def reposetup(ui, repo): pass Index: hg/mercurial/ui.py ===================================================================

hgwebdir index: change "author" to "contact"

Allow using a ssh repository without a path. This uses the home directory on the remote side or the directory specified in the command in .ssh/authorized_keys

Fixed synopsis for grep command.

Fixed zero-padded filenames with %r if there is a longer number in the middle. e.g. with: hg export -o ../%r.patch 99 100 98

Shortened commands.revrange() a little bit, added docstring.

Cleanups to commands.py