Added GNMT post-training quantization example (#252)

.gitignore

README.md

distiller/modules/__init__.py

distiller/modules/aggregate.py

distiller/modules/eltwise.py

distiller/modules/matmul.py

distiller/quantization/range_linear.py

examples/GNMT/LICENSE

examples/GNMT/README.md

examples/GNMT/download_dataset.sh

examples/GNMT/download_trained_model.sh

examples/GNMT/model_stats.yaml

examples/GNMT/quantize_gnmt.ipynb

examples/GNMT/requirements.txt

examples/GNMT/scripts/filter_dataset.py

examples/GNMT/seq2seq/__init__.py

examples/GNMT/seq2seq/data/__init__.py

examples/GNMT/seq2seq/data/config.py

examples/GNMT/seq2seq/data/dataset.py

examples/GNMT/seq2seq/data/sampler.py