CRAN version 1.4.3 with OpenMP support

New CRAN release, no user-visible changes nor bug fixes, just some modifications to docs due to the changes in roxygen2. The attached source codes support OpenMP for Windows, unlike the CRAN version.

CRAN version 1.4.2 (with OpenMP support)

New CRAN release, no user-visible changes nor bug fixes, just some modifications to configure scripts etc as requested by CRAN. The attached source codes support OpenMP for Windows, unlike the CRAN version.