optimized atr training and evaluation

classifiers/attribute_classifiers/atr_data_io_helper.py

classifiers/attribute_classifiers/atr_data_io_helper.pyc

classifiers/attribute_classifiers/eval_atr_classifier.py

classifiers/attribute_classifiers/eval_atr_classifier.pyc

classifiers/attribute_classifiers/train_atr_classifier.py

classifiers/attribute_classifiers/train_atr_classifier.pyc

classifiers/object_classifiers/train_obj_classifier.py

classifiers/object_classifiers/train_obj_classifier.pyc

classifiers/tf_graph_creation_helper.pyc

classifiers/train_classifiers.py