Workaround tqdm issue

Add suggested workaround for https://github.com/tqdm/tqdm/issues/481

mhcflurry/downloads_command.py

@@ -29,6 +29,8 @@ import errno
 import tarfile
 from tempfile import mkstemp
 from tqdm import tqdm
+tqdm.monitor_interval = 0  # see https://github.com/tqdm/tqdm/issues/481
+
 try:
     from urllib.request import urlretrieve
 except ImportError:

mhcflurry/train_allele_specific_models_command.py

@@ -15,6 +15,7 @@ import pandas
 import yaml
 from mhcnames import normalize_allele_name
 import tqdm  # progress bar
+tqdm.monitor_interval = 0  # see https://github.com/tqdm/tqdm/issues/481
 
 from .class1_affinity_predictor import Class1AffinityPredictor
 from .common import configure_logging, set_keras_backend