Improve DGD support

Change-Id: I03a2a0cf296e4cf46ad5f40740fb7871671cb619
diff --git a/.gitignore b/.gitignore
index a00c50a..ffce448 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,4 +34,5 @@
 t/corpus/BRZ13
 t/corpus/DCK
 t/corpus/AGD-orig
+t/corpus/FOLK-orig
 t/real/dck.t