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

- we don't support paraview < 3.x anymore

- alternative to WM_PROJECT_INST_DIR/site for systems with locked down
  installation paths (eg, when packaged as RPM or deb)

  When "$WM_PROJECT_SITE" is defined, it is used in favour of
  "$WM_PROJECT_INST_DIR/site"

- also split on colons for consistency

- replaces previously used 'bin/'

STYLE: add -help to makeWmake

- may be useful in the future. For now it keeps consistency with
  foamPackMake, foamPackBins

- forgot in 10f5e808

- reduces typing

- restricts selection to Make/$WM_OPTIONS* subdirectories, which is
  useful when multiple compilers are in use

Also corrected many formatting errors in the comments in C and H files

- use function when sourcing the bashrc to avoid these problems

This reverts commit 2e1e671d.