+cql_transform() now map structure and other attributes before indexes,
+so that index-specific structures and other attributes can override
+defaults. So now a combination of mapping specifications such as:
+ structure.* = 4=1
+ index.dc.date = 1=date-modified 4=5
+does the right thing.
+
+cql_transform() now also respects the "always" mapping specification,
+which establishes an initial set of attributes to be used for all
+terms except where overridden by more specific attributes associated
+with the index, relation or modifier.