Updates Serialization (#292)

- [X] Removes all save strategies
- [X] Removes duplicate file writer that won't be used
- [X] Removes persistence (it will become a duplicate system)
- [X] Add a save position variable to skip serializing a clean item/mobile
- [X] Update Guilds/Accounts to be IEntity types
    - Because guilds are abstract, this may make serialization tricky.
- [X] Update the generalized IEntity writing
- [X] Update the load/save to write to buffers then to files in background


Bumps release version

Projects/Server/Serialization/ISerializable.cs

@@ -13,14 +13,18 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  *************************************************************************/
 
+using System;
+
 namespace Server
 {
     public interface ISerializable
     {
-        BufferedFileWriter SaveBuffer { get; }
+        BufferWriter SaveBuffer { get; set; }
         int TypeRef { get; }
         Serial Serial { get; }
-        void Serialize();
+        void Serialize(DateTime serializeStart);
+        void Deserialize(IGenericReader reader);
         void Serialize(IGenericWriter writer);
+        void Delete();
     }
 }