made python3 compatible

.gitignore

README.md

caffe_snapshots/caffe_to_tf.py

demo/batch_demo.py

demo/webcam_demo.py

re3_utils/simulator/TrackedObject.py

re3_utils/simulator/simulator.py

tracker/network.py

tracker/re3_multi_tracker.py

tracker/re3_tracker.py

tracker/re3_vot_tracker.py

training/batch_cache.py

training/datasets/imagenet_detection/make_label_files.py

training/datasets/imagenet_video/make_label_files.py

training/test_net.py

training/unrolled_solver.py