Added PushBullet notifications

NzbDrone.Core/Notifications/PushBullet/PushBulletSettings.cs

@@ -0,0 +1,22 @@
+using System;
+using NzbDrone.Core.Annotations;
+
+namespace NzbDrone.Core.Notifications.PushBullet
+{
+    public class PushBulletSettings : INotifcationSettings
+    {
+        [FieldDefinition(0, Label = "API Key", HelpLink = "https://www.pushbullet.com/")]
+        public String ApiKey { get; set; }
+
+        [FieldDefinition(1, Label = "Device ID")]
+        public Int32 DeviceId { get; set; }
+
+        public bool IsValid
+        {
+            get
+            {
+                return !String.IsNullOrWhiteSpace(ApiKey) && DeviceId > 0;
+            }
+        }
+    }
+}