workaround edvr merger with basicsr about deoldify_and_edvr HOT 1 OPEN

further notes:

• apparently, the experiments/pretrained_models dir wants to be created manually
• change all occurrences of python/pip to python3/pip3
• dcn needs to be built by hand before the develop, make the following changes to be compatible with recent versions of pytorch...

in deform_conv_cuda.cpp,
change all occurrences of AT_CHECK
to TORCH_CHECK

In deform_conv_cuda_kernel.cu,
find all of the occurrences of
data_col.data
data_im.data
data_mask.data
data_offset.data
grad_im.data
grad_offset.data
grad_mask.data
and postfix the string "_ptr" to each.
i.e. data_col.data
becomes
data_col.data_ptr

thenceforth, "combining everything" may continue...

from deoldify_and_edvr.