After you clone the repo you'll need to symlink it into appropriate parts of vim's default path. If you have an existing ~/.vim directory containing your own plugins etc that you don't want to overwrite, you could do something like the following:

$ ln -svf "$PWD"/vimrc ~/.vimrc
$ find -mindepth 1 -type d ! -regex ".*\.git.*" -exec mkdir -pv ~/.vim/{} \;
$ find -mindepth 2 -type f ! -regex ".*\.git.*" -exec ln -sv $PWD/{} ~/.vim/{} \;

See LICENCE.md for overview of licences and copyright information (as best I understand/recall).