Things
Mostly based on http://vimcasts.org/episodes/synchronizing-plugins-with-git-submodules-and-pathogen/
Installation:

# get the config from github 
cd ~
git clone http://github.com/deronnek/dotvim.git ~/.vim
ln -s ~/.vim/vimrc ~/.vimrc
ln -s ~/.vim/gvimrc ~/.gvimrc

# update all the plugins that are installed as submodules
cd ~/.vim
git submodule update --init 

# updating a plugin
cd ~/.vim/bundle/fugitive
git pull

# installing a vim plugin - using fugitive as an example
cd ~/.vim
mkdir ~/.vim/bundle # if it doesn't exist already
git submodule add http://github.com/tpope/vim-fugitive.git bundle/fugitive
git add .
git commit -m "Install Fugitive.vim bundle as a submodule."