covid19.analytics Version 1.1

Several new features _ ver 1.1
- added integrity and consistency check fns --integrity.check/consistency.check/data.checks--
- added "geo.loc" argument for report.summary() fn
- added a couple of additional arguments to allow for customization of live.map()
- added new options and function to retrieve US specific TimeSeries datasets: "ts-confirmed-us" and "ts-deaths-us" & covid19.US.data()
- added new option and function to retrieve "Toronto" data: "ts-Toronto" & covid19.Toronto.data()
- added more protection to growth.rate() and confidence bands drawing, to avoid failing plots with missing or inconsistency data
- added trend functions: single.trend(), mtrends() and itrends()