The first running shell on the system should launch tmux automatically
Future shells being opened on the same system will not automatically launch tmux
It does not matter if you later detach from that initial session (you can rejoin with `ta`)
By default, this should prompt to update once every 14 days.
If user answers anything other than y/Y, wait until next cycle
If user answers y/Y, pull down the current branch's dotfiles
(ensure that your machine is on the correct branch if you have multiple)
