ENH: improve installation handling

- uses updated cmake/paraview scripts (1912, patch=200506)
  to support a user-specified installation prefix.

  Reworked the wmake Make/{files,options} files to respect the use
  of CMAKE_INSTALL_PREFIX, or default to FOAM_LIBBIN.

  Similarly the CMakeLists files have been updated to add install
  targets that respect the value of CMAKE_INSTALL_PREFIX.

  For building with paraview-5.7 and 5.8 a "staged" install is used
  to retain the expected output directory structure and to silently
  discard the unneeded static libraries.