- OSspecific: chmod() -> chMod(), even although it's not used anywhere

- ListOps get subset() and inplaceSubset() templated on BoolListType

- added UList<bool>::operator[](..) const specialization.
  Returns false (actually pTraits<bool>::zero) for out-of-range elements.
  This lets us use List<bool> with lazy evaluation and no noticeable
  change in performance.

- use rcIndex() and fcIndex() wherever possible.
  Could check if branching or modulus is faster for fcIndex().

- UList and FixedList get 'const T* cdata() const' and 'T* data()' members.
  Similar to the STL front() and std::string::data() methods, they return a
  pointer to the first element without needing to write '&myList[0]', recast
  begin() or violate const-ness.

Conflicts:
	src/OpenFOAM/db/Time/findInstance.C

- removed the previously added fileName type(), isDir(), isFile() methods.

- added optional bool parameter to isFile() function to explicitly
  enable/disable the check for gzip files.

- fixed minor bugginess where the default usage of isFile() would result in
  false positive matches.

- be slightly more stringent and use isDir() and isFile() instead of
  exists() function when we actually know the expected type.

- add placeholder BoundaryMesh to surfMesh allows us to drop the
  SurfGeoMesh class and just reuse the GeoMesh class.
  Do the same for triSurface.

- renamed surface regions (formerly patches or groups) to surfZone.

- added surfMesh, but without any of the patch information needed to make it
  useful for finiteArea.

- promoted coordinateSystem transformation to surfaceMeshConvert and moved
  old to surfaceMeshConvertTesting.

important e.g. in atmospheric flows.