to try it out:
$ mkdir -p /tmp/vimtest && cd /tmp/vimtest # create and cd to test folder
$ git clone --recursive https://github.com/gmarik/vimfiles.git ./.vim # clone recursively with vundle
$ HOME=`pwd` vim -u .vim/vimrc +BundleInstall +qall # run installation in relative to current folder
# and using downloaded `vimrc`
$ HOME=`pwd` vim -u .vim/vimrc # Start using Vim
NOTE: add -g argument to the vim command to use graphical UI if you like