change penalty expiration datetime to null for perm bans

add tempban max time
allow searching for GUID
stats returns ranking as well
fix for promotion/demotion text

Plugins/Stats/Commands/TopStats.cs

@@ -14,7 +14,6 @@ namespace IW4MAdmin.Plugins.Stats.Commands
 {
     class TopStats : Command
     {
-
         public static async Task<List<string>> GetTopStats(Server s)
         {
             int serverId = s.GetHashCode();