Allow to search groups by location

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

priv/repo/migrations/20200805124620_add_address_to_actors.exs

@@ -0,0 +1,9 @@
+defmodule Mobilizon.Storage.Repo.Migrations.AddAddressToActors do
+  use Ecto.Migration
+
+  def change do
+    alter table(:actors) do
+      add(:physical_address_id, references(:addresses, on_delete: :nothing))
+    end
+  end
+end