ui: Initial Elm UI import

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

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

ui/elm-package.json

@@ -0,0 +1,32 @@
+{
+    "version": "1.0.0",
+    "summary": "Elm powered UI for Inbucket",
+    "repository": "https://github.com/jhillyerd/inbucket.git",
+    "license": "MIT",
+    "source-directories": [
+        "src"
+    ],
+    "exposed-modules": [],
+    "proxy": {
+      "/api": {
+        "target": "http://localhost:9000",
+        "ws": true
+      },
+      "/debug": {
+        "target": "http://localhost:9000"
+      }
+    },
+    "dependencies": {
+        "NoRedInk/elm-decode-pipeline": "3.0.0 <= v < 4.0.0",
+        "basti1302/elm-human-readable-filesize": "1.1.0 <= v < 2.0.0",
+        "elm-lang/core": "5.1.1 <= v < 6.0.0",
+        "elm-lang/html": "2.0.0 <= v < 3.0.0",
+        "elm-lang/http": "1.0.0 <= v < 2.0.0",
+        "elm-lang/navigation": "2.1.0 <= v < 3.0.0",
+        "elm-lang/svg": "2.0.0 <= v < 3.0.0",
+        "elm-lang/websocket": "1.0.2 <= v < 2.0.0",
+        "evancz/url-parser": "2.0.1 <= v < 3.0.0",
+        "jweir/sparkline": "3.0.0 <= v < 4.0.0"
+    },
+    "elm-version": "0.18.0 <= v < 0.19.0"
+}