Fixes dupe exception (#258)

- [X] Cleans up ActivatorUtil
- [X] Fixes dupe exception
- [X] Fixes a bug in BasePotion
- [X] Fixes a few possible memory leaks

Bumps release version

Projects/UOContent/Commands/Object Creation/Categorization.cs

@@ -300,7 +300,7 @@ namespace Server.Commands
         public CategoryTypeEntry(Type type)
         {
             Type = type;
-            Object = ActivatorUtil.CreateInstance(type);
+            Object = type.CreateInstance<object>();
         }
 
         public Type Type { get; }