add option to route root pages

zero.Core/Constants.cs

@@ -76,6 +76,7 @@
     public static class Pages
     {
       public const string FolderAlias = "zero.folder";
+      public const string DefaultRootPageTypeAlias = "root";
     }
   }
 }

zero.Core/Options/PageOptions.cs

@@ -11,6 +11,8 @@ namespace zero.Core.Options
       
     }
 
+    public string Root { get; set; } = Constants.Pages.DefaultRootPageTypeAlias;
+
 
     public void Add<T>(PageType<T> pageType) where T : Page, new()
     {

zero.Core/Routing/Page/PageUrlBuilder.cs

@@ -10,6 +10,7 @@ using zero.Core.Database;
 using zero.Core.Database.Indexes;
 using zero.Core.Entities;
 using zero.Core.Extensions;
+using zero.Core.Options;
 
 namespace zero.Core.Routing
 {
@@ -21,10 +22,13 @@ namespace zero.Core.Routing
 
     protected IZeroStore Store { get; private set; }
 
+    protected IZeroOptions Options { get; private set; }
 
-    public PageUrlBuilder(IZeroStore store)
+
+    public PageUrlBuilder(IZeroStore store, IZeroOptions options)
     {
       Store = store;
+      Options = options;
     }
 
 
@@ -115,6 +119,10 @@ namespace zero.Core.Routing
       {
         alias = page.UrlAlias;
       }
+      else if (page.PageTypeAlias == Options.Pages.Root)
+      {
+        return String.Empty;
+      }
       else if (!page.Alias.IsNullOrWhiteSpace())
       {
         alias = page.Alias;