Added sqlite db and email queue.

server/services/mailService.js

@@ -0,0 +1,20 @@
+'use strict';
+
+angular.module('ffffng')
+.service('MailService', function (Database, _) {
+    return {
+        enqueue: function (sender, recipient, email, data, callback) {
+            if (!_.isPlainObject(data)) {
+                return callback(new Error('Unexpected data: ' + data));
+            }
+            Database.run(
+                'INSERT INTO email_queue (failures, sender, recipient, email, data) VALUES (?, ?, ?, ?, ?)',
+                [0, sender, recipient, email, JSON.stringify(data)],
+                function (err, res) {
+                    debugger;
+                    callback(err, res);
+                }
+            );
+        }
+    };
+});