Based on instructions from: 

http://vimcasts.org/episodes/synchronizing-plugins-with-git-submodules-and-pathogen/

Installation:

(check init.sh for automated/more uptodate installation instructions)

git clone git@github.com:sfsgagi/gitvim.git ~/.vim

Create symlinks:

ln -s ~/.vim/vimrc ~/.vimrc
ln -s ~/.vim/gvimrc ~/.gvimrc

Switch to the `~/.vim` directory, and fetch submodules:

cd ~/.vim
git submodule init
git submodule update