Refactor overriding wread, wwrite, wwritedata repo methods - restrict consistently to reading/writing in working dir - no cludgy sys.argv parsing anymore Eases collaboration with other extensions, or external tools like TortoiseHg. Changes in behaviour: - hg cat does not expand; will be implemented with new kwcat command - no expansion in web /display/, only in downloaded archives Thanks to Jesse Glick for inciting this approach.

(0.9.2compat) fix external hook as in default branch

Return silently when external command triggers error - make hook accept hg command as string or as function object. - intercept dispatch.ParseError as well. Kudos to Steve Borho (TortoiseHg) for testing and debugging.