* refactors table filters by introducing AbstractTableFilter, GeoReferencedTableFilterMixin, ShareableTableFilterMixin and RecordableTableFilterMixin
* adds full filter functionality
* refactors TableFilter inheritances for all objects
* refactors default autocomplete into grouped autocompletes, if parents exist for grouping
* updates requirement for django-autocomplete-light due to an issue with an attribute in pip's default version 3.8.2. More info here: https://github.com/yourlabs/django-autocomplete-light/issues/1278
* adds celery to project
* adds celery background task for updating parcels
* adds parcel calculation to creating of new geometries as well
* tests outstanding!!!
* adds parcel displaying on public reports
* fixes bug in EMA where autocomplete js would not load for modal forms
* fixes bug where BaseContext cached data from last request and reused it, if not overwritten
* adds rendering for detail view
* adds new includable html snippet for parcel rendering
* refactors generic includables in konova/ app into konova/templates/includes/...
* fixes bug where parcels have been reused from the database due to wrong model structure
* adds get_underlying_parcels() for Geometry model
* adds get_underlying_parcels() for GeoReferencedMixin models
* fixes bug where missing geometry would lead to an error during geometry conflict check
* removes unused wfs attribute from AbstractWFSFetcher
* adds/updates translations
* extends sanitize db command to remove unrelated parcels and district from the database
* fixes bug where single parcel wfs match would lead to unexpected behaviour
* adds admin interface for parcels and districts
* adds updating of parcels in case of SimpleGeomForm saving
* refactors WFS fetching to proper POST handling
* adds authentication support to WFS handling
* reduces dummy geometry for tests to a small area to reduce test network traffic overhead
* fixes bug in GeometryConflict conflict checking
* WIP: introduces new konova/utils/wfs/spatial holding SpatialWFSFetcher, which can be fed any geometry and it returns found features
* WIP: adds tests for wfs fetching
* updates requirements.txt
* removes unused messages
* adds geometry conflict message rendering for KOM and OEK
* removes unused methods in GeoReferencedMixin
* generalizes geometrical lookup for conflicts from overlaps to intersects
* refactors geometry field into GeoReferencedMixin, holding more handy methods and used in all models, formerly holding the geometry field
* refactors backend admin configuration, so modified, deleted and created are not editable in the backend which also skips loading of all possible choices
* fixes typo in sanitize_db command
* introduces GeometryConflict model, holding a link between two geometries, where one overlaps the other
* adds first (WIP) messages into detail views of ema and intervention for test purposes
* changes the autocomplete route for user retrieving from _istartswith to full qualified check
* extends the help text for form to inform about full qualified username needed
* updates translation
* adds file mime type check on NewDocumentForm
* adds file size check on NewDocumentForm
* adds is_xy_valid methods as classmethods on AbstractDocument
* adds translations for error messages
* updates help text on NewDocumentForm file field
* moves updating of shared access users into ShareableObjectMixin
* renames ShareInterventionModalForm to ShareModalForm since it's used for EMA and eco accounts as well
* renames model ResponsibilityData into Responsibility
* renames model LegalData into Legal
* moves form->object saving logic into model
* refactors NewDocumentForm into special types for intervention, compensation, eco account and ema
*
* implements 5) "Add 'Maßnahmentyp' for KOMs "
* prepares model and form fields as mixins for easy extension to eco accounts and emas (possibly in the future?)
