Add database entities for USB vendor and product IDs.

DiscImageChef.Database/Models/UsbProduct.cs

@@ -0,0 +1,28 @@
+using System;
+using System.ComponentModel.DataAnnotations;
+
+namespace DiscImageChef.Database.Models
+{
+    public class UsbProduct
+    {
+        public UsbProduct() { }
+
+        public UsbProduct(ushort vendorId, ushort id, string product)
+        {
+            ProductId = id;
+            Product   = product;
+            AddedWhen = ModifiedWhen = DateTime.UtcNow;
+        }
+
+        [Key]
+        public int Id { get;           set; }
+        public ushort ProductId { get; set; }
+
+        public string   Product      { get; set; }
+        public DateTime AddedWhen    { get; set; }
+        public DateTime ModifiedWhen { get; set; }
+
+        public         ushort    VendorId { get; set; }
+        public virtual UsbVendor Vendor   { get; set; }
+    }
+}