Fix --exclude-directory argument

FreeboxMoviePlanner.py

@@ -345,7 +345,8 @@ if __name__ == '__main__':
     )
     parser.add_argument(
         '-x', '--exclude-directory',
-        nargs=1,
+        action='append',
+        default=[],
         help='''Do not display movies available in the following directory.
                 This will prevent you from recording the same movie multiple
                 times.'''
@@ -359,6 +360,7 @@ if __name__ == '__main__':
         movies = TVGuideScraper._getMovies()
     else:
         movies = TVGuideScraper.findAllMovies()
+    print(args.exclude_directory)
     fmp = FreeboxMoviePlanner(
         movies,
         excluded_channels=args.exclude,