fixed bug in handling of drafts (not used presets); typo in sql command
fixed bug in generating multiple dbselect fields; moved club table to
system tables incl. management; added foreign key selection in
usertables; added class interfaces; added translation to use plaintext
keys; introduced custom exceptions and its handling; added results incl.
import, lists, details and pdf; introduced tasks; migrated translation
to plaintext keys; added internal api for ajax calls of jtable; added
city field to calendar and update procedure to field config; a few
bugfixes and improvements