Improve ranking mechanism

Change-Id: I23add5381ba7099485e5883bebad4997962b82ba
diff --git a/lib/Krawfish/Result/Segment/Sort/SubTerm.pm b/lib/Krawfish/Result/Segment/Sort/SubTerm.pm
index b86e964..111af25 100644
--- a/lib/Krawfish/Result/Segment/Sort/SubTerm.pm
+++ b/lib/Krawfish/Result/Segment/Sort/SubTerm.pm
@@ -1,7 +1,9 @@
-package Krawfish::Result::Segment::Sort::Field;
+package Krawfish::Result::Segment::Sort::SubTerm;
 use strict;
 use warnings;
 
+# This will sort based on a pre-ranked subterm
+
 sub new {
   my $class = shift;