ui: Initial Elm UI import

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

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

ui/tests/Tests.elm

@@ -0,0 +1,22 @@
+module Tests exposing (..)
+
+import Test exposing (..)
+import Expect
+
+
+-- Check out http://package.elm-lang.org/packages/elm-community/elm-test/latest to learn more about testing in Elm!
+
+
+all : Test
+all =
+    describe "A Test Suite"
+        [ test "Addition" <|
+            \_ ->
+                Expect.equal 10 (3 + 7)
+        , test "String.left" <|
+            \_ ->
+                Expect.equal "a" (String.left 1 "abcdefg")
+        , test "This test should fail" <|
+            \_ ->
+                Expect.fail "failed as expected!"
+        ]

ui/tests/elm-package.json

@@ -0,0 +1,17 @@
+{
+    "version": "1.0.0",
+    "summary": "Test Suites",
+    "repository": "https://github.com/user/project.git",
+    "license": "BSD3",
+    "source-directories": [
+        ".",
+        "../src"
+    ],
+    "exposed-modules": [],
+    "dependencies": {
+        "elm-lang/core": "5.0.0 <= v < 6.0.0",
+        "elm-community/elm-test": "4.0.0 <= v < 5.0.0",
+        "elm-lang/html": "2.0.0 <= v < 3.0.0"
+    },
+    "elm-version": "0.18.0 <= v < 0.19.0"
+}