convert: Use debugsvnlog instead of git-like debug-svn-log.

extdiff: do single file diffs from the wc with no copy Extdiff was always making a temporary directory and copying files even when not required. This change makes extdiff avoid the copy when diffing a single file that lives in the wc. This lets external diff tools edit the working copy file directly. It also lets other extensions resuse the functions in extdiff and get in-place diffs.

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.

extdiff: un-nested two functions The functions in extdiff that create temporary repo copies for are useful in other extensions, so the change moves them at the module level.

convert: remove accidental debug print

convert: use '.' as destination name if renaming subdir into root

Automated merge with http://hg.intevation.org/mercurial/crew

convert: only get history for requested revs when converting hg repo

convert: raise correct type of exception if svn converter can't handle rev

record: raise an exception correctly if we can't create a backup directory

record: work properly if invoked in a subdirectory

convert: replace fork with subprocess call.

convert: support windows SVN simple auth provider

merge with crew-stable