Added and-group and bitstream template
diff --git a/lib/Krawfish/Query/Base/Dual.pm b/lib/Krawfish/Query/Base/Dual.pm
index 8b7cfbf..59752cc 100644
--- a/lib/Krawfish/Query/Base/Dual.pm
+++ b/lib/Krawfish/Query/Base/Dual.pm
@@ -17,6 +17,12 @@
@EXPORT = qw/NEXTA NEXTB MATCH/;
+# TODO: Next to NEXTA and NEXTB there should be flags for:
+# NEXTX to STARTY (Position skipping)
+# NEXTX to ENDY (Position skipping)
+# NEXTX to ENDX (Position skipping)
+# NEXTX to STARTX+1 (Position skipping)
+
# TODO: Improve by skipping to the same document
sub new {