Update make_datafiles.py

[the-black-knight-01]

Removing this ERRORS
ERROR1:

Traceback (most recent call last):
  File "make_datafiles.py", line 239, in <module>
    write_to_bin(all_test_urls, os.path.join(finished_files_dir, "test.bin"))
  File "make_datafiles.py", line 154, in write_to_bin
    url_hashes = get_url_hashes(url_list)
  File "make_datafiles.py", line 106, in get_url_hashes
    return [hashhex(url) for url in url_list]
  File "make_datafiles.py", line 106, in <listcomp>
    return [hashhex(url) for url in url_list]
  File "make_datafiles.py", line 101, in hashhex
    h.update(s)
TypeError: Unicode-objects must be encoded before hashing

ERROR 2:

PTBTokenizer tokenized 203071165 tokens at 1811476.32 tokens per second.
Stanford CoreNLP Tokenizer has finished.
Successfully finished tokenizing dailymail/stories/ to dm_stories_tokenized.

Making bin file for URLs listed in url_lists/all_test.txt...
Writing story 0 of 11490; 0.00 percent done
Traceback (most recent call last):
  File "make_datafiles.py", line 239, in <module>
    write_to_bin(all_test_urls, os.path.join(finished_files_dir, "test.bin"))
  File "make_datafiles.py", line 184, in write_to_bin
    tf_example.features.feature['article'].bytes_list.value.extend([article])
TypeError: "marseille , france -lrb- cnn -rrb- the french prosecutor leading an investigation into the crash of has type str, but expected one of: bytes

ERROR 3:
print should contain ().