add link to xero's dotfiles, with info about using managing them with gnu stow

in the linux world we take dotfiles seriously. i've started to manage my with gnu stow, and it's been great. my dotfiles repos as an entire guide dedicated to using stow to manage yours. people must like the idea, because i have a growing number of forks and stars :grinning: 

my dotfiles have *lots* of configs, including: 
- awesome wm
- compton
- linux fonts
- figlet
- git
- herbstluftwm
- midnight commander
- mpd
- ncmpcpp
- pacman
- sublime text
- vim
- urxvt
- zsh