fix(core): Fixes several serialization issues (#355)

- [X] Fixes an issue where a buffer smaller than 8 bytes would not double with enough space in some cases.
- [X] Fixes an issue with dupe copying the savebuffer reference (ugh).
- [X] Streamlines the IGenericWriter API to use better generics.
- [X] Streamlines the IGenericReader API to use better generics.
- [X] Forces `tidying` of a List/HashSet to be done externally since Writers/Readers should not have side effects.
- [X] Fixes an issue where Tidying a list didn't TrimExcess, causing memory leaks.
- [X] Reverted the meaning of `World.Running` to specifically refer to any world state post world loading.
  - NOTE: Do not use this if you want to block on world saves. Instead use checks against `WorldState.Saving` states.
- [X] Fixes an issue with serializing negative DateTime deltas.
- [X] Fixes a potential issue with serializing non-UTC DateTime.

Bumps release version

Projects/Server/Guild.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
 
 namespace Server.Guilds
@@ -30,19 +31,14 @@ namespace Server.Guilds
         public abstract bool Disbanded { get; }
         public abstract void Delete();
 
-        public BufferWriter SaveBuffer { get; set; }
+        public bool Deleted => Disbanded;
 
         [CommandProperty(AccessLevel.Counselor)]
         public Serial Serial { get; }
 
-        public int TypeRef => 0;
+        BufferWriter ISerializable.SaveBuffer { get; set; }
 
-        public void Serialize()
-        {
-            SaveBuffer ??= new BufferWriter(true);
-            SaveBuffer.Reset();
-            Serialize(SaveBuffer);
-        }
+        public int TypeRef => 0;
 
         public abstract void Serialize(IGenericWriter writer);
         public abstract void Deserialize(IGenericReader reader);