Add GetBestMatch to TvDbProvider (Provides a way to get the best result from a list of results)

Default value for Quality Dropbox in AddExisting is now the default value from Settings.

NzbDrone.Web/Views/AddSeries/AddExisting.aspx

@@ -7,6 +7,9 @@
 </asp:Content>
 <asp:Content ID="Content2" ContentPlaceHolderID="MainContent" runat="server">
     <%
+        if (Model.Count() == 0)
+            Html.DisplayText("No Series to Add");
+        
         foreach (var path in Model)
         {
             Html.RenderAction("RenderPartial", "AddSeries", new { path });