Fix JSON DLL, NativeUI as git submodule, Add LogManager, Fix DB Migrations

ReallifeGamemode.Database/Models/DatabaseContext.cs

@@ -1,4 +1,5 @@
 using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Design;
 using Microsoft.Extensions.Logging;
 
 /**
@@ -141,6 +142,13 @@ namespace ReallifeGamemode.Database.Models
 
     //ItemShop
     public DbSet<Entities.ShopItem> ShopItems { get; set; }
+  }
 
+  public class DesignTimeDbContextFactory : IDesignTimeDbContextFactory<DatabaseContext>
+  {
+    public DatabaseContext CreateDbContext(string[] args)
+    {
+      return new DatabaseContext();
+    }
   }
 }