Add RNNs and Embedding readme

5-NLP/14-Embeddings/EmbeddingsPyTorch.ipynb

5-NLP/14-Embeddings/README.md

5-NLP/16-RNN/README.md

5-NLP/16-RNN/RNNPyTorch.ipynb

5-NLP/16-RNN/RNNTF.ipynb

5-NLP/16-RNN/images/long-short-term-memory-cell.svg

5-NLP/16-RNN/images/multi-layer-lstm.jpg

5-NLP/16-RNN/images/rnn-anatomy.png

5-NLP/16-RNN/images/rnn.png

5-NLP/16-RNN/torchnlp.py

5-NLP/README.md

README.md