* adds workaround in case of received WFS exception -> routine waits 1 second and tries to rerun for another time. If this does fail as well, the routine will end without a result
* adds mailto shortcut to contact button in footer for a quick fix
* adds mail sending if shared data is deleted
* adds/updates translations
* refactors recording mails into separate email template folder email/recording
* moves mail sending to celery worker using shared_task in konova/tasks.py
* adds mail sending for shared access given
* adds UserNotification settings checks for mail sending
* adds/updates translations
* enhances rendering of tables
* enhances rendering of filter section
* reorganizes table filter codes into konova/filters/ folder and splits into mixins and table_filters
* refactors XYTableFilter classes to hold query_filter and checkbox_filter which are separate instances of django_filter.FilterSets
* improves render ability for frontend
* 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
