[TASK] ADWD-1312 Read and update for all Stammdaten with change handler

- Remove Restangular as it can be replaced with a mere 5 lines of code
- Highlight changes
- Submit with CSRF token
Merge pull request #78 from subugoe/DataExport

Data export
Merge pull request #79 from subugoe/stammdateneditors

[TASK] ADWD-1312 Read and update for all Stammdaten with change handler
[TASK] SolrUpdateAspect adapted