laurafeeney

Added documentation by beefing up the readmes in the data/raw, data/processed, and analyses/notebooks folders.

updated readmes in the data/raw, data/processed, and analysis/notebooks folders.

Began writing scripts for this in [How many expungable notebook](https://github.com/codeforboston/clean-slate/blob/master/analyses/notebooks/How%20many%20expungable.ipynb). Not clear that we need a second issue #154 for this -- seems liek that's duplicate tracking, but I'll leave...

Updates on the new policing bill from Sana, December 2020: Just a quick update...the policing bill that is currently being negotiated has an expansion of the expungement law, that if...