Introduce group basic federation, event new page and notifications

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

priv/repo/migrations/20200218085757_add_new_roles_to_member.exs

@@ -0,0 +1,14 @@
+defmodule Mobilizon.Storage.Repo.Migrations.AddNewRolesToMember do
+  use Ecto.Migration
+  @disable_ddl_transaction true
+
+  def up do
+    Ecto.Migration.execute("ALTER TYPE member_role ADD VALUE IF NOT EXISTS 'invited'")
+    Ecto.Migration.execute("ALTER TYPE member_role ADD VALUE IF NOT EXISTS 'rejected'")
+  end
+
+  def down do
+    IO.puts("Not removing value 'invited' from member_role type")
+    IO.puts("Not removing value 'rejected' from member_role type")
+  end
+end