[vim-tmux-navigator][1]:
> Seamless navigation between tmux panes and vim splits
Add the hybrid vim/tmux plugin `vim-tmux-navigator` to switch between
tmux panes and vim splits with `C-[hjkl]`.
Add vim-tmux-navigator as a submodule in tmux/plugins and create a
symlink from vim/pack/plugins/start.
Get rid of similar switching keymappings in the vim and tmux configs.
[1]: https://github.com/christoomey/vim-tmux-navigator
Update all submodules to the newest commit.
Change submodule names in `.gitmodules` from local path to repo names.
Sort and group `.gitmodules` by program that uses it.
Remove the clone of 'fzf-tab' as my pull request got merged.
