[Docs] Add header for files (#1181)

* [Docs] Add header for files

* change to OpenMMLab

* add headers for .cpp, .cu, .h, .cuh

* replace Open-MMLab with OpenMMLab

mmcv/ops/pixel_group.py

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

mmcv/ops/roi_align.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 import torch.nn as nn
 from torch.autograd import Function

mmcv/ops/roi_align_rotated.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch.nn as nn
 from torch.autograd import Function
 

mmcv/ops/roi_pool.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 import torch.nn as nn
 from torch.autograd import Function

mmcv/ops/saconv.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 import torch.nn as nn
 import torch.nn.functional as F

mmcv/ops/sync_bn.py

+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 import torch.distributed as dist
 import torch.nn.functional as F

mmcv/ops/tin_shift.py

+# Copyright (c) OpenMMLab. All rights reserved.
 # Code reference from "Temporal Interlacing Network"
 # https://github.com/deepcs233/TIN/blob/master/cuda_shift/rtc_wrap.py
 # Hao Shao, Shengju Qian, Yu Liu

mmcv/parallel/__init__.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 from .collate import collate
 from .data_container import DataContainer
 from .data_parallel import MMDataParallel

mmcv/parallel/_functions.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 from torch.nn.parallel._functions import _get_stream
 

mmcv/parallel/collate.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 from collections.abc import Mapping, Sequence
 
 import torch

mmcv/parallel/data_container.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 import functools
 
 import torch

mmcv/parallel/data_parallel.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 from itertools import chain
 
 from torch.nn.parallel import DataParallel

mmcv/parallel/distributed.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 from torch.nn.parallel.distributed import (DistributedDataParallel,
                                            _find_tensors)

mmcv/parallel/distributed_deprecated.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 import torch.distributed as dist
 import torch.nn as nn

mmcv/parallel/registry.py

+# Copyright (c) OpenMMLab. All rights reserved.
 from torch.nn.parallel import DataParallel, DistributedDataParallel
 
 from mmcv.utils import Registry

mmcv/parallel/scatter_gather.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 import torch
 from torch.nn.parallel._functions import Scatter as OrigScatter
 

mmcv/parallel/utils.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 from .registry import MODULE_WRAPPERS
 
 

mmcv/runner/__init__.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 from .base_module import BaseModule, ModuleList, Sequential
 from .base_runner import BaseRunner
 from .builder import RUNNERS, build_runner

mmcv/runner/base_module.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 import copy
 import warnings
 from abc import ABCMeta

mmcv/runner/base_runner.py

-# Copyright (c) Open-MMLab. All rights reserved.
+# Copyright (c) OpenMMLab. All rights reserved.
 import copy
 import logging
 import os.path as osp