covid19.data            function to read "live" data as reported by
                        JHU's CCSE repository
covid19.genomic.data    function to obtain sequencing data grom NCBI
                        Reference:
                        https://www.ncbi.nlm.nih.gov/nuccore/NC_045512.2
generate.SIR.model      function to generate a simple SIR
                        (Susceptible-Infected-Recovered) model based on
                        the actual data of the coivd19 cases
growth.rate             function to compute daily changes and "Growth
                        Rates" per location; "Growth Rates" defined as
                        the ratio between changes in consecutive days
live.map                function to map cases in an interactive map
movingFn                generic fn that computes the "fn" on a moving
                        window
plt.SIR.model           function to plot the results from the SIR model
                        fn
report.summary          function to summarize the current situation,
                        will download the latest data and summarize the
                        top provinces/cities per case
totals.plt              function to plot total number of cases per day
                        for different groups
tots.per.location       function to compute totals per location
