Support for other version controls?

[kompowiec]

What do you think about add support for CVS, SVN, SCCS, CSSC RCS, Mercurial, Bazaar, SRC, etc...? Or at least for mercurial cuz large companies like Mozilla, Facebook (though they may have moved to a Mercurial fork called Eden), Google (as part of a custom VC codebase called Piper), Nokia, and Jane Street have used Mercurial.