The 'hg svn url' command has been killed; the replacement is
'.hg/hgrc'. More stuff related to its disappearance has been stripped,
including two tests.
HgChangeReceiver now takes a UUID argument, which it uses to ensure
that remote repositories remain unchanged. This is a temporary
solution, and I'm not entirely satisfied with how it's done either.
Access to the UUID file has been isolated in a HgChangeReceiver
property.
Some more tests have been updated to use ui.pushbuffer()/popbuffer(),
and to pass through the Mercurial API.
Moved the arguments to wrappers.pull() to the UI configuration.
Also, remove HgChangeReceiver.opts in favour of a 'usebranchnames'
instance & configuration variable. The name is taken from the
ConvertExtension.
