Use vi mode for the shell and bind ? to reverse history search.
Make 'vi' always use macvim on macs and fix up ge so it works on both
linux and osx.
Add local cd, spell checking, and easy paste mode.
Add Control-R back in for reverse history search incase I forget I'm not
using emacs mode...
Change mapleader to , and bind . to repeat a command and jump back to
where the edit started.
Fix the Control-R binding typo.
Switch to use oh-my-zsh's vi-mode instead of explicitly doing it in
the config.