Fix some warnings

* Add analyzers to MediaBrowser.XbmcMetadata
* Enable TreatWarningsAsErrors for MediaBrowser.XbmcMetadata
* Add analyzers to MediaBrowser.WebDashboard
* Enable TreatWarningsAsErrors for MediaBrowser.WebDashboard
* Disable SA1600 in favor of CS1591

MediaBrowser.XbmcMetadata/Configuration/NfoConfigurationFactory.cs

@@ -0,0 +1,24 @@
+#pragma warning disable CS1591
+
+using System.Collections.Generic;
+using MediaBrowser.Common.Configuration;
+using MediaBrowser.Model.Configuration;
+
+namespace MediaBrowser.XbmcMetadata.Configuration
+{
+    public class NfoConfigurationFactory : IConfigurationFactory
+    {
+        /// <inheritdoc />
+        public IEnumerable<ConfigurationStore> GetConfigurations()
+        {
+            return new[]
+            {
+                new ConfigurationStore
+                {
+                     ConfigurationType = typeof(XbmcMetadataOptions),
+                     Key = "xbmcmetadata"
+                }
+            };
+        }
+    }
+}