- handle ThirdParty-VERSION properly

- handle wmake/utilbin/ location

- should the wmake/rules/* really be packed with a binary distribution?
  I think this is just left over from before.

- keeps sources in sync for the 1.6 release and it'll get fiddled with
  for the 1.7 release anyhow

- IMO we should retain ReleaseNotes-1.5 and distribute it with OpenFOAM-1.6
  as well.

- rename thermalDissipationEff() -> thermalDissipationEquilibrium()

- first stab at a simple runtime selection for extra turbulence-related
  features

- the code duplication seems to indicate that a common ancestor
  for compressible and incompressible turbulence models could be good