Issue #110: [feature request] add keyword search

docs/usage.rst

@@ -217,6 +217,25 @@ You can also load file names from one or more local files::
 You can read more about this `here <#id3>`_
 
 
+Interesting keywords
+--------------------
+Dirhunt can warn you if it finds a specific keyword in the response body. This will only work if the response body is
+available in a index of, html, css or js file.
+
+.. code::
+
+    $ dirhunt <url> -k <name 1>[,<name 2>]
+
+For example::
+
+    $ dirhunt http://domain1/blog/ -k "admin,login,pass"
+
+
+You can also load keywords from one or more local files::
+
+    $ dirhunt http://domain1/blog/ -k /home/user/keywords.txt,./words.txt
+
+
 Exclude
 -------
 Filter the results using the ``--exclude-flags`` (``-x``) parameter (see the `flags section <#Flags>`_ to