Initial GNU Stow Automation

* Copy group_vars/all.yml.example => group_vars/all.yml and update accordingly
* Requires you do the following first:
  * Download stow-2.2.0.tar.bz2 => roles/common/files/src/stow-2.2.0.tar.bz2
  * Update group_vars/all.yml to reflect your download version number