Feature
* Add plotting functions ([`7f7586d`](https://github.com/UBC-MDS/tweetlytics/commit/7f7586d0b40d380e086d60960a0e248ced88933e))
Documentation
* Modified docstring of clean_tweets ([`998c2d5`](https://github.com/UBC-MDS/tweetlytics/commit/998c2d56446a2f29a277fca3c3172657197413d5))
* Created docstrings for clean_tweets function ([`9e293a1`](https://github.com/UBC-MDS/tweetlytics/commit/9e293a1f751923f4706b881f605f84f493dca8c4))