Add notification sending functionality.

src/Scylla/Notification.elm

@@ -0,0 +1,11 @@
+port module Scylla.Notification exposing (..)
+import Scylla.Model exposing (..)
+import Json.Decode
+
+type alias Notification =
+    { name : String
+    , text : String
+    }
+
+port sendNotificationPort : Notification -> Cmd msg
+port onNotificationClockPort : (Json.Decode.Value -> msg) -> Sub msg