Merge branch '95-send-spots-to-xota' into 2.0-pre

# Conflicts:
#	README.md
#	core/config.py
#	server/handlers/api/addspot.py
#	server/handlers/api/lookups.py
#	server/handlers/api/options.py
#	server/webserver.py
#	spothole.py
#	static/apidocs/openapi.yml

providers/spot/hema.py

@@ -74,3 +74,11 @@ class HEMA(HTTPSpotProvider):
             except ConnectionError:
                 logging.warning("Connection error when accessing HEMA spots API.")
         return new_spots
+
+    def can_submit_spot(self, sig):
+        return sig == "HEMA"
+
+    def submit_spot(self, spot, credentials):
+        # TODO: Implement. Currently blocked awaiting their API team to make a change to allow us to spot with a
+        # reference and not a reference *number*.
+        raise NotImplementedError("HEMA upstream spot submission is not yet implemented")