ui: Initial Elm UI import

Merged from https://github.com/jhillyerd/inbucket-elm

Uses https://github.com/halfzebra/create-elm-app

ui/src/Page/Home.elm

@@ -0,0 +1,42 @@
+module Page.Home exposing (Model, Msg, init, update, view)
+
+import Html exposing (..)
+import Html.Attributes exposing (..)
+import Data.Session as Session exposing (Session)
+
+
+-- MODEL --
+
+
+type alias Model =
+    {}
+
+
+init : Model
+init =
+    {}
+
+
+
+-- UPDATE --
+
+
+type Msg
+    = Msg
+
+
+update : Session -> Msg -> Model -> ( Model, Cmd Msg, Session.Msg )
+update session msg model =
+    ( model, Cmd.none, Session.none )
+
+
+
+-- VIEW --
+
+
+view : Session -> Model -> Html Msg
+view session model =
+    div [ id "page" ]
+        [ h1 [] [ text "Inbucket" ]
+        , text "This is the home page"
+        ]