vim: Fix quitting and buffer deletion confirmation
bash: Better handle GNU coretuils on OSX

We don't want to override ALL the coretuils, really just the ones we
care about that are /usually/ used by a user instead of a script (though
dircolors is a slight exception in this case) that way we don't break
scripts running interactively.
bash: Alias vi -> vim
sublime-text: Remove sublime-text macbook config