I have downloaded the model and vocab files into a specific location, using their original file names, so my directory for bert-base-cased contains: ``` bert-base-cased-vocab.txt bert_config.json pytorch_model.bin ``` But when I try to specify the directory which contains these files for the `--bert_model` parameter of `extract_features.py` I get the following error: ``` ValueError: Can't find a vocabulary file at path <THEDIRECTORYPATHISPECIFIED> ... ``` When I specify a file that exists and is a proper file, the error messages seem to indicate that the program wants to untar and uncompress the files. Is there no way to just specify a specific directory that contains the vocab, config, and model files?