Initial release of the cash shop sales (#1825)

Added a permission for the cashshop sales

Thanks to @Angelic234 and everyone else who tested this feature while it was sleeping waiting in a pull request.
Thanks to @aleos89, @secretdataz and @lighta for reviewing and commenting.

sql-files/main.sql

@@ -813,6 +813,18 @@ CREATE TABLE IF NOT EXISTS `mercenary_owner` (
   PRIMARY KEY  (`char_id`)
 ) ENGINE=MyISAM;
 
+-- ----------------------------
+-- Table structure for `sales`
+-- ----------------------------
+
+CREATE TABLE IF NOT EXISTS `sales` (
+  `nameid` smallint(5) unsigned NOT NULL,
+  `start` datetime NOT NULL,
+  `end` datetime NOT NULL,
+  `amount` int(11) NOT NULL,
+  PRIMARY KEY (`nameid`)
+) ENGINE=MyISAM;
+
 --
 -- Table structure for table `sc_data`
 --