CompareCovid19DataSources

Retrieves "county-level processed" files from Yu-Group (Berkeley) github repo and then compares files, producing:

1. log with differences noted
2. csv file with pairwise differences for each observation (cases or deaths for a given day)
3. heatmaps of various slices of pairwise difference matrix
4. csv file with processed data in a common format. This file might be useful for visually inspecting the counts for counties with large discrepancies.

4/27/2020 functionality: nytimes_infection vs usafacts_infection are compared.

Usage: bin/compareCSV.pl -outdir <dir>

     -excludeIdentical (default) or -noex:  suppress printing identical entries  
     -fetch or -nofetch:           hook to avoid multiple wgets (for testing)