Fixed parsing WindowsPhone message statuses.

Added "NotAvailable" enum fields to better match documentation, enum
parsing changed to case insensitive (so it now correctly parses value
"Inactive" to "InActive" field).

PushSharp.WindowsPhone/WindowsPhoneMessageStatus.cs

@@ -19,6 +19,7 @@ public class WindowsPhoneMessageStatus
 
 	public enum WPNotificationStatus
 	{
+        NotAvailable,
 		Received,
 		Dropped,
 		Suppressed,
@@ -27,6 +28,7 @@ public enum WPNotificationStatus
 
 	public enum WPDeviceConnectionStatus
 	{
+        NotAvailable,
 		Connected,
 		InActive,
 		Disconnected,
@@ -35,6 +37,7 @@ public enum WPDeviceConnectionStatus
 
 	public enum WPSubscriptionStatus
 	{
+        NotAvailable,
 		Active,
 		Expired
 	}

PushSharp.WindowsPhone/WindowsPhonePushChannel.cs

@@ -125,25 +125,25 @@ WindowsPhoneMessageStatus ParseStatus(HttpWebResponse resp, WindowsPhoneNotifica
 			result.Notification = notification;
 			result.HttpStatus = resp.StatusCode;
 
-			var wpStatus = resp.Headers["X-NotificationStatus"];
-			var wpChannelStatus = resp.Headers["X-SubscriptionStatus"];
-			var wpDeviceConnectionStatus = resp.Headers["X-DeviceConnectionStatus"];
+            var wpStatus = resp.Headers["X-NotificationStatus"];
+            var wpChannelStatus = resp.Headers["X-SubscriptionStatus"];
+            var wpDeviceConnectionStatus = resp.Headers["X-DeviceConnectionStatus"];
 			var messageID = resp.Headers["X-MessageID"];
 
 			Guid msgGuid = Guid.NewGuid();
 			if (Guid.TryParse(messageID, out msgGuid))
 				result.MessageID = msgGuid;
 
-			WPDeviceConnectionStatus devConStatus = WPDeviceConnectionStatus.InActive;
-			Enum.TryParse<WPDeviceConnectionStatus>(wpDeviceConnectionStatus, out devConStatus);
+			WPDeviceConnectionStatus devConStatus = WPDeviceConnectionStatus.NotAvailable;
+            Enum.TryParse<WPDeviceConnectionStatus>(wpDeviceConnectionStatus, true, out devConStatus);
 			result.DeviceConnectionStatus = devConStatus;
 
-			WPNotificationStatus notStatus = WPNotificationStatus.Dropped;
-			Enum.TryParse<WPNotificationStatus>(wpStatus, out notStatus);
+			WPNotificationStatus notStatus = WPNotificationStatus.NotAvailable;
+            Enum.TryParse<WPNotificationStatus>(wpStatus, true, out notStatus);
 			result.NotificationStatus = notStatus;
 
-			WPSubscriptionStatus subStatus = WPSubscriptionStatus.Expired;
-			Enum.TryParse<WPSubscriptionStatus>(wpChannelStatus, out subStatus);
+			WPSubscriptionStatus subStatus = WPSubscriptionStatus.NotAvailable;
+            Enum.TryParse<WPSubscriptionStatus>(wpChannelStatus, true, out subStatus);
 			result.SubscriptionStatus = subStatus;
 
 			return result;