Added nightwatch conf and guinea pig test

nightwatch.json

@@ -0,0 +1,17 @@
+{
+  "src_folders" : ["test/nightwatch"],
+
+  "test_settings" : {
+    "default" : {
+      "silent": true,
+      "screenshots" : {
+        "enabled" : false,
+        "path" : ""
+      },
+      "desiredCapabilities": {
+        "browserName": "phantomjs",
+		"javascriptEnabled" : true
+      }
+    }
+  }
+}

test/nightwatch/first_time_flow.js

@@ -0,0 +1,9 @@
+module.exports = {
+  'Welcome page loads' : function (browser) {
+    browser
+      .url('http://localhost:5050')
+      .waitForElementVisible('body', 1000)
+      .assert.containsText('body', 'Welcome to Polaris')
+      .end();
+  }
+};