Any file which matches the shell glob _* will be linked into $HOME as a symlink with the first _ replaced with a .

For example:

_bashrc

becomes

${HOME}/.bashrc

It's as simple as running:

./install.sh

From this top-level directory.

I've extended the install.sh script to handle .config directory, too. Just create a directory named '_config' and add files or directories in this directory. Everything inside _config will be symlinked to .config.