chore(dotfiles): note date for new work machine in .irl.rb
chore(dotfiles): note date for new work machine in .irl.rb

Haven't set the machine up yet; will do that tomorrow (setting up a
~/.zsh/host/ entry and so on to complete this set-up).

wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent,wincent/wincent