Replace Vim Nix support with version from LnL7
Replace Vim Nix support with version from LnL7

MarcWeber version wasn't very featureful, and it also had the annoyance
of using addon-info.json, which Vundle doesn't support.

benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles,benizi/dotfiles