new components: cam and replacement

lib/rohd_hcl.dart

@@ -12,20 +12,21 @@ export 'src/encodings/encodings.dart';
 export 'src/error_checking/error_checking.dart';
 export 'src/exceptions.dart';
 export 'src/extrema.dart';
-export 'src/fifo.dart';
 export 'src/find.dart';
 export 'src/find_pattern.dart';
 export 'src/gaskets/spi/spi_gaskets.dart';
 export 'src/interfaces/interfaces.dart';
+export 'src/memory/cam.dart';
+export 'src/memory/fifo.dart';
 export 'src/memory/memories.dart';
+export 'src/memory/resettable_entries.dart';
+export 'src/memory/shift_register.dart';
 export 'src/models/models.dart';
 export 'src/priority_encoder.dart';
 export 'src/reduction_tree.dart';
 export 'src/reduction_tree_generator.dart';
-export 'src/resettable_entries.dart';
 export 'src/rotate.dart';
 export 'src/serialization/serialization.dart';
-export 'src/shift_register.dart';
 export 'src/signed_shifter.dart';
 export 'src/sort.dart';
 export 'src/static_or_runtime_parameter.dart';