Support Unicode filenames in Python 2

This is related to #79.

cppclean

@@ -35,6 +35,12 @@ from cpp import tokenize
 from cpp import utils
 
 
+try:
+    unicode
+except NameError:
+    unicode = str
+
+
 def match_file(filename, exclude_patterns):
     """Return True if file is a C++ file or a directory."""
     base_name = os.path.basename(filename)
@@ -96,6 +102,9 @@ def main():
                         help='ignore parse errors')
     args = parser.parse_args()
 
+    # For Python 2 where argparse does not return Unicode.
+    args.files = [unicode(filename) for filename in args.files]
+
     status = 0
     for filename in (
         sorted(find_files(args.files,