config file to maintain db, dbf and defualt_date_for_map variables

config.py

+db = "./covid-19-data/us-counties.csv"
+
+default_date_for_map = "2020-03-11"
+
+# database file downloaded from
+# https://www.weather.gov/source/gis/Shapefiles/County/c_03mr20.zip
+# to get the lat and long values for US counties
+dbf = "./c_03mr20.dbf"