add hidden account, cart insert/delete

add hidden account support
add delete/payout buttons to carts
add backend product sales with pdf export
add frontend product sales with pdf export
add frontend ticket sales with pdf export

console/migrations/m160103_172422_alter__table__card__make__number__unique.php

@@ -0,0 +1,30 @@
+<?php
+
+use yii\db\Schema;
+use yii\db\Migration;
+
+class m160103_172422_alter__table__card__make__number__unique extends Migration
+{
+    public function up()
+    {
+		$this->execute("ALTER IGNORE TABLE card ADD UNIQUE (number);");
+    }
+
+    public function down()
+    {
+        echo "m160103_172422_alter__table__card__make__number__unique cannot be reverted.\n";
+
+        return false;
+    }
+
+    /*
+    // Use safeUp/safeDown to run migration code within a transaction
+    public function safeUp()
+    {
+    }
+
+    public function safeDown()
+    {
+    }
+    */
+}