Also rework the variables in the environment to use /bin/true and
/bin/false instead of string representations of this. Might cause
problems, haven't tested yet
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)
