You may need to remove existing ~/.vimrc file and ~/.vim/ folder
cd ~
git clone git@github.com:bozze/vim-files.git .vim
ln -s .vim/vimrc .vimrc
cd ~/.vim/
git submodule update --init --recursive
cd ~/.vim/
git submodule add CLONE_URL bundle/PLUGIN_NAME
git pull origin master
cd ~/.vim/bundle/<plugin-name>
git pull origin master
cd ~/.vim/
git submodule update --init --recursive