thoughtbot/dotfiles — pull request #185 by JoelQ (2013-08-23 21:44:37+00:00)
Title: Add seamless navigation between vim & tmux splits

From this blog post:
http://robots.thoughtbot.com/post/53022241323/seamlessly-navigate-vim-and-tmux-splits

It gets very confusing to have a seperate set of key-bindings for
switching between vim-splits and tmux panes.