Add libraries for EntityFramework

Stats plugin work
Allow plugins to dynamically add EF classes to the context

Plugins/SimpleStats/Models/EFServer.cs

@@ -0,0 +1,16 @@
+
+using SharedLibrary.Database.Models;
+using System.ComponentModel.DataAnnotations;
+using System.ComponentModel.DataAnnotations.Schema;
+
+namespace StatsPlugin.Models
+{
+    public class EFServer : SharedEntity
+    {
+        [Key]
+        [DatabaseGenerated(DatabaseGeneratedOption.None)]
+        public int ServerId { get; set; }
+        [Required]
+        public int Port { get; set; }
+    }
+}