+Added support for raw retrieval. Element Set Name R forces the
+text filter which returns the record in its original form.
+
+Added numerical sort - triggered by structure=numeric (4=109).
+
+Remote record import using Z39.50 Extended Services and Segments.
+
+Fixed bug where updating a database with user-defined attributes
+could corrupt the register (bad storeKeys).
+
+Multi-threaded version.
+
+Fixed bug regarding proximity.