Add header for files (#869)

* Add header for files

* Add header for files

* Add header for files

* Add header for files

tools/misc/browse_dataset.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 import numpy as np
 import warnings

tools/misc/fuse_conv_bn.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 import torch
 from mmcv.runner import save_checkpoint

tools/misc/print_config.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 from mmcv import Config, DictAction
 

tools/misc/visualize_results.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 import mmcv
 from mmcv import Config

tools/model_converters/convert_votenet_checkpoints.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 import tempfile
 import torch

tools/model_converters/publish_model.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 import subprocess
 import torch

tools/model_converters/regnet2mmdet.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 import torch
 from collections import OrderedDict

tools/test.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import argparse
 import mmcv
 import os

tools/train.py

+# Copyright (c) OpenMMLab. All rights reserved.
 from __future__ import division
 
 import argparse