Upgrades spawners to have parameters/properties and optimized timers (#6)

Upgrades spawners to have:
- [X] Parameter support
- [X] Property support
- [X] Optimized timers
- [X] Support for Proximity Spawners
- [X] Probabilities

Scripts/Regions/Spawning/SpawnPersistence.cs

@@ -4,6 +4,7 @@ using Server;
 
 namespace Server.Regions
 {
+	[TypeAlias( "Server.Regions.SpawnPersistance" )]
 	public class SpawnPersistence : Item
 	{
 		private static SpawnPersistence m_Instance;
@@ -66,4 +67,4 @@ namespace Server.Regions
 			}
 		}
 	}
-}
+}