Switched from old hashing functions to use Bob Jenkins' hash routine

- If the underlying type is contiguous, FixedList hashes its storage directly.
- Drop labelPairHash (non-commutative) from fvMeshDistribute since
  FixedList::Hash does the right thing anyhow.
- Hash<edge> specialization is commutative, without multiplication.
- Hash<triFace> specialization kept multiplication (but now uLabel).
  There's not much point optimizing it, since it's not used much anyhow.

Misc. changes

- added StaticAssert to NamedEnum.H
- label.H / uLabel.H : define FOAM_LABEL_MAX, FOAM_ULABEL_MAX with the
  values finally used for the storage.  These can be useful for pre-processor
  checks elsewhere (although I stopped needing them in the meantime).

src/OpenFOAM/Make/files

@@ -52,7 +52,7 @@ $(strings)/fileName/fileNameIO.C
 $(strings)/keyType/keyTypeIO.C
 $(strings)/wordRe/wordReIO.C
 
-primitives/hashes/Hashing/Hashing.C
+primitives/hashes/Hasher/Hasher.C
 
 sha1 = primitives/hashes/SHA1
 $(sha1)/SHA1.C