Payment Update

Moving payment timers into the database
Adding the last payment timer cycle to the stats

lib/api.js

@@ -75,7 +75,8 @@ app.get('/pool/stats', function (req, res) {
     let localCache = global.database.getCache('pool_stats_global');
     delete(localCache.minerHistory);
     delete(localCache.hashHistory);
-    res.json({pool_list: pool_list, pool_statistics: localCache});
+    let lastPayment = global.database.getCache('lastPaymentCycle');
+    res.json({pool_list: pool_list, pool_statistics: localCache, last_payment: !lastPayment ? 0 : lastPayment});
 });
 
 app.get('/pool/chart/hashrate', function (req, res) {
@@ -601,7 +602,7 @@ adminRoutes.get('/stats', function (req, res) {
             });
             return callback(null);
         }
-    ], function (err) {
+    ], function () {
         return res.json(intCache);
     });
 });