Add offline availability of w3css

Whatsapp_Chat_Exporter/__main__.py

@@ -103,6 +103,11 @@ def main():
         default=False,
         action='store_true',
         help="Move the media directory to output directory if the flag is set, otherwise copy it")
+    parser.add_option(
+        "--offline",
+        dest="offline",
+        default=None,
+        help="Relative path to offline static files")
     (options, args) = parser.parse_args()
 
     if options.android and options.iphone:
@@ -194,7 +199,7 @@ def main():
             messages(db, data)
             media(db, data, options.media)
             vcard(db, data)
-        create_html(data, options.output, options.template, options.embedded)
+        create_html(data, options.output, options.template, options.embedded, options.offline)
     else:
         print(
             "The message database does not exist. You may specify the path "