- allows us to follow the changes

- improves code re-usage for pre-receive hook

- normally only for doxygen generation, not needed in the path

- this usage can correspond to a 'git commit --amend'

- only search indexed files (BUGFIX)
- search for long-lines is faster when regex is anchored
- use git grep logic instead of sed logic where possible

- add support for running the hook manually as well.
  For example,
      bin/tools/pre-commit-hook  applications/test src/OpenFOAM/db

- add some feedback to pre-commit hook:
  The hook can be really slow, at least let people know that something
  is happening

This reverts commit 102f7970.

ENH: report line number for illegal words and for copyrights

- allows fixes before trying to push

- makes it easier to cut-and-paste from dictionary contents that use
  the Foam::findEtcFile expansion

- remove all corresponding logic from foamExec

- This lets foamExec use foamEtcFile as well, but debian packaging
  still needs some work

- avoids them showing on related pages

- improves flexibility and allows more consistent long options