.tmux.conf: Less time between commands in a command sequence

Makes tmux feel more responsive, like when you enter copy mode you
can immediately start paging up and down; before tmux would wait a
second or so for other escape characters.

.tmux.conf

@@ -76,6 +76,9 @@ bind '"' choose-window
 # use Escape for entering copy mode, like screen
 bind Escape copy-mode
 
+# less time between commands in a command sequence
+set -s escape-time 0
+
 # use vi-style key bindings
 set-option -g mode-keys vi