Refactor utils and organize routes/schema

schema/message.model.js

@@ -0,0 +1,19 @@
+const mongoose = require('mongoose');
+const Schema = mongoose.Schema;
+
+// Database schema for an email message
+let Message = new Schema({
+    name: {
+        type: String
+    },
+    subject: {
+        type: String
+    },
+    body: {
+        type: String
+    }
+}, {
+    collection: 'messages'
+});
+
+module.exports = mongoose.model('Message', Message);