Pytorch implementation of Google Quantization

Experimental results:

MOdel	Weight Bit	Act Bit	top-1
Res-50	8	8	75.46%

The pruning schemes follow these papers:

@article{jacob2017quantization,
  title={Quantization and training of neural networks for efficient integer-arithmetic-only inference},
  author={Jacob, Benoit and Kligys, Skirmantas and Chen, Bo and Zhu, Menglong and Tang, Matthew and Howard, Andrew and Adam, Hartwig and Kalenichenko, Dmitry},
  journal={arXiv preprint arXiv:1712.05877},
  year={2017}
}