post-review: support for plain mercurial repos

Review Request #869 — Created May 18, 2009 and discarded — Latest diff uploaded

Information

cr
Review Board SVN (deprecated)

Reviewers

Adds a client for plain mercurial repos (not hgsubversion).
- renamed the hgsubversion class to MercurialSVNClient
- added a copy named MercurialClient using plain hg command lines

tested with:
$ hg --version
Mercurial Distributed SCM (version 1.2.1)