Importer (s/u-info) vegetation zones: new database column in vegetation_type table for german type name, localized vegetation type names by querying the database instead of translating by resource property, detecting and cancelling the import of a second vegetation zone file for a river, detecting, logging, cancelling in case of wrong column titles, detecting, logging and ignoring lines with missing (color) values, comparing vegetation zone name and class with the database and logging+ignoring in case of inconsistencies, starting the most elevated zone with 0 instead of -1 overflow days

- Validation of the input values of an incoming feed() call