Actually bring README.md up to date

README.md

@@ -28,9 +28,10 @@ $ pip3 install -r requirements.txt
 
 ```bash
 $ python3 sherlock.py --help
-usage: sherlock.py [-h] [--version] [--verbose] [--quiet] [--tor]
+usage: sherlock.py [-h] [--version] [--verbose] [--rank]
+                   [--folderoutput FOLDEROUTPUT] [--output OUTPUT] [--tor]
                    [--unique-tor] [--csv] [--site SITE_NAME]
-                   [--proxy PROXY_URL]
+                   [--proxy PROXY_URL] [--json JSON_FILE]
                    USERNAMES [USERNAMES ...]
 
 Sherlock: Find Usernames Across Social Networks (Version 0.4.0)
@@ -43,6 +44,8 @@ optional arguments:
   --version             Display version information and dependencies.
   --verbose, -v, -d, --debug
                         Display extra debugging information and metrics.
+  --rank, -r            Present websites ordered by their Alexa.com global
+                        rank in popularity.
   --folderoutput FOLDEROUTPUT, -fo FOLDEROUTPUT
                         If using multiple usernames, the output of the results
                         will be saved at this folder.