Added the hotkey configuration note

Author: farcaller

README.md

@@ -13,6 +13,22 @@ You can look up the word under the cursor or selected text in Dash using `ctrl+h
 1. Install the [Sublime Package Control][6] package.
 2. Use Package Control to install this package (DashDoc)
 
+### Hotkey configuration
+
+DashDoc no longer comes with a default hotkey.
+
+To set up the hotkey for dash open the Preferences > Key Bindings from the menu
+and add a new entry that looks like this:
+
+    { "keys": ["YOUR HOTKEY"], "command": "dash_doc"}
+
+for the default mode
+
+    { "keys": ["YOUR HOTKEY"], "command": "dash_doc",
+                               "args": { "flip_syntax_sensitive": true } }
+
+for the flipped case sensitive mode.
+
 ### Dependencies
 
 [xdg-utils][9] on Linux.