Determine {mode,status}-keys from the environment
Install vim-bracketed-paste

This automatically toggles `set paste` when pasting into Vim running in a
terminal that supports bracketed paste mode.
Set zsh keymap from VISUAL or EDITOR

If one of the VISUAL or EDITOR environment variables contain the string
`vi` when the shell starts up the keymap will be `viins`, otherwise it
will be `emacs`.
Wrap Git commit messages at 72 characters

This is also set by ftplugin/gitcommit.vim but only if `textwidth` was 0
globally, and we default to 79.