covid v1.0.0-beta.1

Starting Features

• List available countries
• Print status message for a country with
  • Virus Control Scale (VCS)
  • Forecast with spread rate (based on --days or --since)
  • Forecast with spread and control rates (based on --compareDays or --compareSince)
  • Data source set to bumbeishvili/covid19-daily-data
• Custom templates under ~/.covid (default.tpl or select with env COVID_TPL)