consistency update

- DynamicList gets append methods as per List
- misc cosmetic changes

src/OpenFOAM/containers/HashTables/HashTable/HashTable.H

@@ -28,6 +28,13 @@ Class
 Description
     An STL-conforming hash table.
 
+Note
+    Hashing index collisions are handled via chaining using a singly-linked
+    list with the colliding entry being added to the head of the linked
+    list. Thus copying the hash table (or indeed even resizing it) will
+    often result in a different hash order. Use a sorted table-of-contents
+    when the hash order is important.
+
 SourceFiles
     HashTableI.H
     HashTable.C