#49 Frontend rendering

* 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

konova/utils/wfs/spatial.py

@@ -22,7 +22,6 @@ class AbstractWFSFetcher:
     # base_url represents not the capabilities url but the parameter-free base url
     base_url = None
     version = None
-    wfs = None
     auth_user = None
     auth_pw = None
     auth_digest_obj = None