[Nix-dev] Various patches

[Marc Weber]

About Vim: Also consider contributing to
http://github.com/MarcWeber/vim-addon-nix

About mercurial: My marc-next branch contains full mercurial support
including most extensions.

Eg my config.nix file:

mercurial = {
  atticSupport = true;
  guiSupport = true;
  pbranchSupport = true;
  hgsubversionSupport = true;
  mqSupport = true;
  histeditSupport = true;
  hgextconvertSupport = true;
  collapseSupport = true;
  record = true;
};

Marc Weber