GitLab

- add new lets enrcypt chain to gain access to login.gesis.org
- variable stuff

- add variable report
- add futher classification

- add wahlkategorien

add limesurvey all language export based on Document Generator: adapotion of extraction classes to JSON representation with all languages

#443

Merge remote-tracking branch 'origin/setup_qeditor_to_handle_qmd_and_ed' into setup_qeditor_to_handle_qmd_and_ed

- throw out ElasticSearch

split up of ddieditor and access controller: add the acces controller to provide the REST access to ddi  entites

- split Java DDI entites manipulation class into seperate project; rework some dependencies to split up
- general cleanup of unused or old classes