Bugfixes:
- Removed usage of rpnf:::* within own package, as recommended by CRAN
- Fixed error that prevented the user from changing the reversal parameter

git-svn-id: svn://svn.r-forge.r-project.org/svnroot/rpnf@40 edb9625f-4e0d-4859-8d74-9fd3b1da38cb