ENH: add foamHasLibrary to test for availability of libraries (#1735)

- For some cases it can be helpful to test if additional libraries can
  be properly resolved.

  This can be useful in scripts to test for additional capability:

      if foamHasLibrary geometricVoF
      then ...
      fi

  But also directly from the command-line to help resolve configuration
  issues:

      foamHasLibrary -verbose petscFoam

  Could not load "petscFoam"
  libpetsc.so.3.13: cannot open shared object file: No such file or directory