Added some Zone features

Extensions/Cloudflare.Zones/Models/ZoneHold.cs

@@ -0,0 +1,28 @@
+using System;
+
+namespace AMWD.Net.Api.Cloudflare.Zones
+{
+	/// <summary>
+	/// A zone hold.
+	/// </summary>
+	public class ZoneHold
+	{
+		/// <summary>
+		/// Gets or sets a value indicating whether the zone is on hold.
+		/// </summary>
+		[JsonProperty("hold")]
+		public bool Hold { get; set; }
+
+		/// <summary>
+		/// Gets or sets an information whether subdomains are included in the hold.
+		/// </summary>
+		[JsonProperty("include_subdomains")]
+		public string IncludeSubdomains { get; set; }
+
+		/// <summary>
+		/// Gets or sets the time after which the zone is no longer on hold.
+		/// </summary>
+		[JsonProperty("hold_after")]
+		public DateTime HoldAfter { get; set; }
+	}
+}