contextily_guide.ipynb missing

[marianoju]

The notebook contextily_guide.ipynb referenced in the README.md is missing from the repository.

[darribas]

thanks for the report! We should probably remove that and change it to point to the main documentation website (contextily.readthedocs.io) as there's a lot more content now. Otherwise, the closest to that original notebook is over at the intro_guide. I'll try to get around it at some point but if there's any bandwith on your end, PRs are most welcome :-)