Initial split of the modules

NadekoBot.Core/Services/Database/Models/WaifuUpdate.cs

@@ -0,0 +1,21 @@
+namespace NadekoBot.Services.Database.Models
+{
+    public class WaifuUpdate : DbEntity
+    {
+        public int UserId { get; set; }
+        public DiscordUser User { get; set; }
+        public WaifuUpdateType UpdateType { get; set; }
+
+        public int? OldId { get; set; }
+        public DiscordUser Old { get; set; }
+
+        public int? NewId { get; set; }
+        public DiscordUser New { get; set; }
+    }
+
+    public enum WaifuUpdateType
+    {
+        AffinityChanged,
+        Claimed
+    }
+}