Pegasus::HashIndex: Added optimized behaviour for indices with one field when sizeof (field) < sizeof (size_t).
RecordCollection: Implemented SignalRepresentation, which is a special case of PointRepresentation, that tracks only one small (8 bytes or less) field and reports records that have preselected value in this field. It allows to use so-called signal fields (like bool needsSync) much more effectively than PointRepresentation.
sizeof (field) < sizeof (size_t).bool needsSync) much more effectively than PointRepresentation.