tmux: add key binding to move windows around

config/tmux/tmux.conf

@@ -31,12 +31,14 @@ bind -r C-j     resize-pane -D 2
 bind -r C-k     resize-pane -U 2
 bind -r C-l     resize-pane -R 2
 
-# Arrangement of panes
+# Arrangement of panes & windows
 bind    b       break-pane \; select-pane -m \; last-window
 bind    H       join-pane -h -b
 bind    J       join-pane -v
 bind    K       join-pane -v -b
 bind    L       join-pane -h
+bind -r >       swap-window -d -t :+
+bind -r <       swap-window -d -t :-
 
 # Choosing layouts
 bind -r C-o     rotate-window