Usage:
$ git clone --recurse-submodules https://github.com/tianon/home.git ~/somewhere/useful/and/permanent # (you don't want to have to move this after install)
$ ~/somewhere/useful/and/permanent/install.sh
$ # profitIf you ever git pull, be sure to update submodules too (git submodule update).
If there are new features added to install.sh, it is intended to be idempotent, so feel free to run it again and it should ensure that all functionality is installed and enabled.
(You'll probably also want to create git-config.d/personal and include user.name and user.email in it, if they don't already exist in your ~/.gitconfig!)