* Fixed #28 /admin/database/import
* Fixed #66 frontend: migrate to Bootstrap Theme sb-admin-angular
* Fixed #158 load Bootstrap-Template sb-admin-angular into static
* Fixed #191 setup plantuml for engineering and docs
* Fixed #156 run_web.sh
* Fixed #157 run_worker.sh
* Fixed #62 frontend: better design for pages
* Fixed #60 frontend: better design for tables

* Fixed #82 change to ORM ClassHierarchy
* Fixed #42 SQLalchemy instead of SQL: WhoImport.get_new_dates_as_array()
* Fixed #83 SQLalchemy instead of SQL in WhoImport.get_new_dates_as_array
* Fixed #108 change to ORM ClassHierarchy in: EcdcImport.get_countries_of_continent
* Fixed #39 SQLalchemy instead of SQL: AllModelClasses.remove_all()
* Fixed #40 SQLalchemy instead of SQL: EcdcImport.get_date_rep()
* Fixed #41 SQLalchemy instead of SQL: EcdcImport.get_countries_of_continent()
* Fixed #107 SQLalchemy instead of SQL in: EcdcImport.get_countries_of_continent
* Fixed #109 SQLalchemy instead of SQL in: EcdcImport.get_date_rep
* Fixed #110 SQLalchemy instead of SQL in: EcdcImport.get_continent
* Fixed #123 split RkiBundeslaenderService into two Services, one for bundeslaender and one for landkreise
* Fixed #128 add fields from csv to RkiLandkreiseImport
* Fixed #139 refactor RkiBundeslaenderServiceDownload to new method scheme introduced 07.02.2021
* Fixed #140 move WhoImport to RKI in: rk_service_import.py
* Fixed #125 implement RkiLandkreise
* Fixed #126 implement RkiBundeslaenderImport

* Fixed #69 Branch: ISSUE_66_ATTEMPT_01
* Fixed #70 load package.json from Bootstrap-Template sb-admin-angular into statics
* Fixed #67 implement Flask-Login (wontfix)
* Issue #159 merge Branch ISSUE_66_ATTEMPT_01 to master