- use standard *.sh, *.csh endings

- need to trap possibly weird input within etc/bashrc, etc/cshrc and
  can't easily redirect stderr in csh.

- used in "expandDictionary -list" to find which files are included by
  any particular dictionary

- a single root entry is interpreted as being the same for all slaves

Expensive to look it up in the lambda function, passing from trackToFace as an
argument.

Conflicts:
	src/OpenFOAM/meshes/primitiveMesh/primitiveMeshClear.C

- optionally returns centre point as well

- slightly bigger display so re-patching does not pick up original outside
- additional refinement at inlet since 2 cells across is too few occasionally
- changed feature angle to pick up more edges