Replace state_of_languages.ipynb - added visualizations - removed the Top 20...
- Replace state_of_languages.ipynb - added visualizations - removed the Top 20 section (with note) as that's now moved to the state_of_languages-top20.ipynb
- Replace state_of_languages.ipynb - added visualizations - wrote new viz to PNG
- Replace qa_state_of_languages.ipynb - corrections and additions