Add example for visualizing word vectors with TensorBoard Projector
Add example for visualizing word vectors with TensorBoard Projector

Use:

```bash
python vectors_tensorboard.py en_core_web_lg ./output_folder spaCy_large
```

honnibal/spaCy,explosion/spaCy,recognai/spaCy,explosion/spaCy,honnibal/spaCy,aikramer2/spaCy,honnibal/spaCy,recognai/spaCy,explosion/spaCy,aikramer2/spaCy,recognai/spaCy,spacy-io/spaCy,explosion/spaCy,recognai/spaCy,explosion/spaCy,aikramer2/spaCy,spacy-io/spaCy,spacy-io/spaCy,spacy-io/spaCy,aikramer2/spaCy,explosion/spaCy,spacy-io/spaCy,recognai/spaCy,aikramer2/spaCy,recognai/spaCy,aikramer2/spaCy,honnibal/spaCy,spacy-io/spaCy