* Fixed #26 /admin/database/dump
* Issue #43 /europe/date_reported
* Issue #44 /europe/continent
* Issue #45 /europe/country
* Issue #46 /europe/data
* Issue #39 SQLalchemy instead of SQL: AllModelClasses.remove_all()
* Issue #40 SQLalchemy instead of SQL: EuropeDataImportTable.get_date_rep()
* Issue #41 SQLalchemy instead of SQL: EuropeDataImportTable.get_countries_of_continent()
* Issue #42 SQLalchemy instead of SQL: WhoGlobalDataImportTable.get_new_dates_as_array()
* Issue #49 EuropeServiceUpdate.__update_data_short()
* Issue #50 remove unused requirements from requirements.txt