Adding note on our methodology change to include probable cases.
drwxr-xr-x - .github
-rw-r--r-- 1289 LICENSE
-rw-r--r-- 3162 PROBABLE-CASES-NOTE.md
-rw-r--r-- 15463 README.md
-rw-r--r-- 4745409 us-counties.csv
-rw-r--r-- 111270 us-states.csv
-rw-r--r-- 2129 us.csv