Vendor pretrainedmodels

[adamjstewart]

Same as #1036

Pretrainedmodels doesn't have wheels on PyPI, and is no longer maintained. It contains numerous Python version compatibility issues as well. Let's vendor it and maintain it ourselves. This will make SMP easier to install.

We can and should try to deprecate these in favor of timm in the long run. This PR doesn't do that though.

[codecov]

Codecov Report

Attention: Patch coverage is 78.38215% with 155 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
segmentation_models_pytorch/encoders/_dpn.py	70.05%	53 Missing ⚠️
segmentation_models_pytorch/encoders/_senet.py	68.03%	39 Missing ⚠️
segmentation_models_pytorch/encoders/_xception.py	70.90%	32 Missing ⚠️
...tion_models_pytorch/encoders/_inceptionresnetv2.py	85.25%	23 Missing ⚠️
...gmentation_models_pytorch/encoders/_inceptionv4.py	94.40%	8 Missing ⚠️

Files with missing lines	Coverage Δ
segmentation_models_pytorch/__init__.py	92.85% <ø> (-0.70%)	⬇️
...mentation_models_pytorch/encoders/_efficientnet.py	74.90% <ø> (-0.19%)	⬇️
segmentation_models_pytorch/encoders/dpn.py	93.87% <100.00%> (ø)
...ation_models_pytorch/encoders/inceptionresnetv2.py	94.82% <100.00%> (ø)
...egmentation_models_pytorch/encoders/inceptionv4.py	92.68% <100.00%> (ø)
segmentation_models_pytorch/encoders/senet.py	93.02% <100.00%> (-0.16%)	⬇️
segmentation_models_pytorch/encoders/xception.py	94.82% <100.00%> (ø)
...gmentation_models_pytorch/encoders/_inceptionv4.py	94.40% <94.40%> (ø)
...tion_models_pytorch/encoders/_inceptionresnetv2.py	85.25% <85.25%> (ø)
segmentation_models_pytorch/encoders/_xception.py	70.90% <70.90%> (ø)
... and 2 more

[qubvel]

Thanks for moving encoders! I think we can cleat the code a bit, removing unnecessary methods, functions, vars (same as for the efficientnet). It will also make the patch more test covered 😄

[qubvel]

Thanks!