See http://openfoam.cfd-online.com/cgi-bin/forum/show.cgi?126/11559

- regIOobject: don't re-register an unregister object on rename/assignment
- Hasher: split-off HasherInt with uint32_t specializations
- IOobject: writeBanner/writeDivider return Stream for easier chaining.

... also dropped some namespace bracketing while I was at it.

- this seems to be the most sensible solution.
  The changed time stamps on the links doesn't seem to bother make at all.

- 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).

	modified:   finiteVolume/cfdTools/general/MRF/MRFZone.C
modified:   finiteVolume/cfdTools/general/MRF/MRFZone.H
	modified:   ../tutorials/incompressible/MRFSimpleFoam/mixerVessel2D/constant/MRFZones

- not much speed difference between SuperFastHash and Jenkin's lookup3 but
  both are 5-10% faster than what is currently implemented in Foam::string,
  albeit inlining probably helps there.

- TODO: integration with existing infrastructure

http://openfoam.cfd-online.com/cgi-bin/forum/show.cgi?126/10948

- catch people using silly template sizes for FixedList, PackedList

- compare iteratorBase == iteratorBase by value, not position
  thus this works
      list[a] == list[b] ...

- compare iterator == iteratorBase and const_iterator == iteratorBase
  by position, not value. The inheritance rules means that this works:
      iter == list.end() ...
  this will compare positions:
      iter == list[5];
  Of course, this will still compare values:
      *iter == list[5];

- Hash returns unsigned
- FixedList templated on unsigned int
- include uLabel.H in UList, HashTable etc. so the output function is know
  throughout