Merge pull request huggingface#288 from huggingface/gpt2

forgot to add regex to requirements.txt :(

Merge pull request huggingface#287 from huggingface/gpt2

Gpt2

Merge pull request huggingface#268 from wangxiaodiu/master

fixed a minor bug in README.md

Adds tag 0.5.0 for pypi

Merge pull request huggingface#254 from huggingface/python_2

Adding OpenAI GPT and Transformer-XL models, compatibility with Python 2

Merge pull request huggingface#112 from huggingface/fourth-release

Fourth release

Merge pull request huggingface#73 from huggingface/third-release

Third release

bump version in setup.py

bump version in setup.py

Merge pull request huggingface#29 from huggingface/first-release

First release