Update README.md

Update for the customization options for the midway action.

Fixes #46

README.md

@@ -90,3 +90,31 @@ where to look, i.e. the top-left corners of each window.
 So you can turn off the gray background with:
 
     (setq aw-background nil)
+
+### `aw-dispatch-always`
+
+When non-nil, `ace-window` will issue a `read-char` event for one window.
+This will make `ace-window` act different from `other-window` for one
+or two windows. This is useful to be able to change the action midway
+and execute other action other than the *jump* default.
+By default is set to `nil`
+
+### `aw-dispatch-alist`
+
+This is the list of actions that you can trigger from `ace-window` other than the
+*jump* default.
+By default is:
+
+    (defvar aw-dispatch-alist
+    '((?x aw-delete-window " Ace - Delete Window")
+        (?m aw-swap-window " Ace - Swap Window")
+        (?n aw-flip-window)
+        (?v aw-split-window-vert " Ace - Split Vert Window")
+        (?b aw-split-window-horz " Ace - Split Horz Window")
+        (?i delete-other-windows " Ace - Maximize Window")
+        (?o delete-other-windows))
+    "List of actions for `aw-dispatch-default'.")
+
+If the pair key-action is followed by a string, then `ace-window` will be
+invoked again to be able to select on which window you want to select the
+action. Otherwise the current window is selected.