add media category

hacking thru this gif thing for now. It takes more than 5mb

Author: Garland Trice

twitter/api.py

@@ -1262,7 +1262,7 @@ def _UploadMediaChunkedInit(self,
         """
         url = '%s/media/upload.json' % self.upload_url
 
-        media_fp, filename, file_size, media_type = parse_media_file(media)
+        media_fp, filename, file_size, media_type = parse_media_file(media, media_category)
 
         if not all([media_fp, filename, file_size, media_type]):
             raise TwitterError({'message': 'Could not process media file'})