update README.md

README.md

@@ -32,14 +32,14 @@ By default bookmobile will download the specified url and save to the current di
 ./bookmobile http://article.url
 ```
 
-Additional options available:
+Full usage:
 
 ```
 Bookmobile: Simple command line script to download articles for offline reading as html, epub or markdown. Saves a simplified html document to current directory as default.
 
-Optionally, you can specify a theme, format and output directory
+Optionally, you can specify a theme, format, filename and output directory
 
-Usage: ./bookmobile url [ --theme THEME ] [ --format FORMAT ] [ --output OUTPUT ]
+Usage: ./bookmobile url [ --theme THEME ] [ --format FORMAT ] [ --name FILENAME ] [ --output OUTPUT ]
                     [-h | --help ]
 
 Options:
@@ -60,11 +60,13 @@ Options:
     -f FORMAT  Set file format (html, reader, markdown, epub)
                default: html
 
+    --name NAME
+    -n NAME Set specified file name instead of defaulting to article title
+
     --output OUTPUT
     -o OUTPUT  Set output location
                default: current directory
 
-
 ```