[WIP] Use `vi` keybindings to resize panes.
Use `vi` keybindings to resize panes:

```
diff --git a/.tmux.conf b/.tmux.conf
index cd79f03..1bdf77a 100644
--- a/.tmux.conf
+++ b/.tmux.conf
@@ -45,6 +45,12 @@ bind Tab select-pane -t :.+
 # vi-like keybindings, when copy-mode
 set-window-option -g mode-keys vi

+# Resize panes, using vim keybindings
+bind -r H resize-pane -L 5
+bind -r J resize-pane -D 5
+bind -r K resize-pane -U 5
+bind -r L resize-pane -R 5
+
 # ------------------------ #
 # mouse mode
 # ------------------------ #
```
Merge pull request #28 from kazu634/tmux-pane-resize

Use `vi` keybindings to resize panes.