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/Spells/Necromancy/AnimateDeadSpell.cs

@@ -343,7 +343,7 @@ namespace Server.Spells.Necromancy
 
             try
             {
-                summoned = ActivatorUtil.CreateInstance(toSummon) as Mobile;
+                summoned = toSummon.CreateInstance<Mobile>();
             }
             catch
             {

Projects/UOContent/Spells/Necromancy/SummonFamiliar.cs

@@ -181,7 +181,7 @@ namespace Server.Spells.Necromancy
                 {
                     try
                     {
-                        var bc = (BaseCreature)ActivatorUtil.CreateInstance(entry.Type);
+                        var bc = entry.Type.CreateInstance<BaseCreature>();
 
                         // TODO: Is this right?
                         bc.Skills.MagicResist.Base = m_From.Skills.MagicResist.Base;