Added support for DGD pseudo-sentences based on anchor milestones

Change-Id: I4bbbde7906cec533f9e12916027a0dedb57bdcdf
diff --git a/Readme.pod b/Readme.pod
index 7a87ccc..8e82eda 100644
--- a/Readme.pod
+++ b/Readme.pod
@@ -133,7 +133,8 @@
 
 Define the layer for base sentences.
 If given, this will be used instead of using C<Base#Sentences>.
-Currently C<DeReKo#Structure> is the only additional layer supported.
+Currently C<DeReKo#Structure> and C<DGD#Structure> are the only additional
+layers supported.
 
  Defaults to unset.
 
@@ -364,6 +365,7 @@
 
   DGD
     #Morpho
+    #Structure
 
   DRuKoLa
     #Morpho