- less efficient and less portable than using single-pass processing

Avoids a lot of unnecessary clutter in the compilation log.

Changed 'ld' line to include path of target library or executable.

Based on patch contributed by Alexey Matveichev
Resolves feature request http://bugs.openfoam.org/view.php?id=2328

Patch contributed by Bruno Santos
Resolves bug-report http://bugs.openfoam.org/view.php?id=2218

Patch contributed by Bruno Santos
Resolves bug-report http://bugs.openfoam.org/view.php?id=2091

which may be optionally overridden by version-specific rules.

For example the default rules for gcc on GNU/Linux x86_64 are in the
wmake/rules/linux64Gcc directory.  If there is a need to change any of
the rules for a specific version of gcc, e.g. gcc-4.8.4 the directory
wmake/rules/linux64Gcc48 may be created into which any of the language
files may be provided containing the rules to override the defaults.

The Makefiles are now in the makefiles sub-directory

The "-f | -force" option in wmakeLnInclude is now "-u | -update" for
consistency with the other scripts.

The "Usage" entry in the headers is now consistently formatted in all
scripts.