Added corpus classes to corpus queries

Change-Id: I11e102399146ef2cdd626df1dbc64b5f32c9c35d
diff --git a/lib/Krawfish/Corpus.pm b/lib/Krawfish/Corpus.pm
index f624e6a..b8a7f50 100644
--- a/lib/Krawfish/Corpus.pm
+++ b/lib/Krawfish/Corpus.pm
@@ -10,7 +10,8 @@
   my $self = shift;
   return unless defined $self->{doc_id};
   return Krawfish::Posting->new(
-    doc_id => $self->{doc_id}
+    doc_id => $self->{doc_id},
+    flags  => $self->{flags}
   );
 };