----------------
- Fix the environment passed to subprocesses; Mercurial did not appreciate
the mangled PYTHONPATH.
[stefan]
- Allow to specify the branch or tag to check out from Git and Mercurial
repositories.
[stefan]
- Adapt to new status output in Subversion 1.6.
[stefan]
- Always include ``distdefault`` in list-locations.
[stefan]
- Detect Subversion repos from ``file://`` URLs.
[stefan]
- Detect bare Git repos from ``file://`` URLs.
[stefan]