To use this setup:

clone repo at ~/.vim
ln -s ~/.vim/vimrc ~/.vimrc
ln -s ~/.vim/gvimrc ~/.gvimrc

install pathogen vim plugin
https://github.com/tpope/vim-pathogen

install vim plugins as git submodules
Example:
mkdir ~/.vim/bundle
git submodule add http://github.com/tpope/vim-fugitive.git bundle/fugitive
git add .
git commit -m "Install Fugitive.vim bundle as a submodule."
http://vimcasts.org/episodes/synchronizing-plugins-with-git-submodules-and-pathogen/